已解决：感谢 fkim 和 Slayer Birden 的持续帮助，我能够将问题缩小到 checkout.xml 文件。经过大量愚蠢的试验和错误后，我只是将我的文件与 magento 原始文件进行了比较，并开始删除我的更改。我在其中注释掉第 318 行的更改是罪魁祸首。谢谢大家。
（旧线程如下） 编辑：所以我只是尝试刷新单个缓存并检查站点。刷新“配置”缓存并没有造成麻烦，但“布局”缓存似乎是罪魁祸首。这会改变事情吗？
原文：所以我在 cart.oldfloridian.com 上有一个 Magento 站点，当我尝试刷新缓存时，它会中断一点。
一切都会正常工作，然后当我刷新缓存时，购物车侧边栏小部件会消失，如果您直接导航到结帐/购物车和结帐/单页页面，它们就会停止加载内容。也就是说，它们加载页眉、侧边栏、页脚，但不加载特定于页面的内容。
然后我可以将站点恢复到较早的备份，一切都恢复并运行。刷新缓存。又没有购物车了。目前我已经恢复，所以购物车存在。
那么我从哪里开始呢？我主要是一名设计师，所以这个权限/缓存的东西对我来说有点不透明。
var/cache 设置为 755，其子目录也是如此。他们的文件是 600s 和 644s。这是一个问题吗？
任何帮助表示赞赏。谢谢。
编辑：所以 checkout.xml 在下面。我不确定我在寻找什么，但事情似乎还不错。我所做的一项更改是注释掉显示用户登录的那一行，以使整个站点“仅限访客”。还有人看到什么吗？
<?xml version="1.0"?>
<!--
/**
* Magento
*
* NOTICE OF LICENSE
*
* This source file is subject to the Academic Free License (AFL 3.0)
* that is bundled with this package in the file LICENSE_AFL.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/afl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@magentocommerce.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade Magento to newer
* versions in the future. If you wish to customize Magento for your
* needs please refer to http://www.magentocommerce.com for more information.
*
* @category design
* @package base_default
* @copyright Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
* @license http://opensource.org/licenses/afl-3.0.php Academic Free License (AFL 3.0)
*/
-->
<layout version="0.1.0">
<!--
Default layout, loads most of the pages
-->
<default>
<!-- Mage_Checkout -->
<reference name="top.links">
<block type="checkout/links" name="checkout_cart_link">
<action method="addCartLink"></action>
<action method="addCheckoutLink"></action>
</block>
</reference>
<reference name="left">
<block type="checkout/cart_sidebar" name="cart_sidebar" template="checkout/cart/sidebar.phtml" before="-">
<action method="addItemRender"><type>simple</type><block>checkout/cart_item_renderer</block><template>checkout/cart/sidebar/default.phtml</template></action>
<action method="addItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/cart/sidebar/default.phtml</template></action>
<action method="addItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/cart/sidebar/default.phtml</template></action>
<block type="core/text_list" name="cart_sidebar.extra_actions" as="extra_actions" translate="label" module="checkout">
<label>Shopping Cart Sidebar Extra Actions</label>
</block>
</block>
</reference>
</default>
<checkout_cart_index translate="label">
<label>Shopping Cart</label>
<remove name="right"/>
<remove name="left"/>
<!-- Mage_Checkout -->
<reference name="root">
<action method="setTemplate"><template>page/1column.phtml</template></action>
</reference>
<reference name="content">
<block type="checkout/cart" name="checkout.cart">
<action method="setCartTemplate"><value>checkout/cart.phtml</value></action>
<action method="setEmptyTemplate"><value>checkout/cart/noItems.phtml</value></action>
<action method="chooseTemplate"/>
<action method="addItemRender"><type>simple</type><block>checkout/cart_item_renderer</block><template>checkout/cart/item/default.phtml</template></action>
<action method="addItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/cart/item/default.phtml</template></action>
<action method="addItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/cart/item/default.phtml</template></action>
<block type="core/text_list" name="checkout.cart.top_methods" as="top_methods" translate="label">
<label>Payment Methods Before Checkout Button</label>
<block type="checkout/onepage_link" name="checkout.cart.methods.onepage" template="checkout/onepage/link.phtml"/>
</block>
<block type="page/html_wrapper" name="checkout.cart.form.before" as="form_before" translate="label">
<label>Shopping Cart Form Before</label>
</block>
<block type="core/text_list" name="checkout.cart.methods" as="methods" translate="label">
<label>Payment Methods After Checkout Button</label>
<block type="checkout/onepage_link" name="checkout.cart.methods.onepage" template="checkout/onepage/link.phtml"/>
<block type="checkout/multishipping_link" name="checkout.cart.methods.multishipping" template="checkout/multishipping/link.phtml"/>
</block>
<!--<block type="checkout/cart_coupon" name="checkout.cart.coupon" as="coupon" template="checkout/cart/coupon.phtml"/>
<block type="checkout/cart_shipping" name="checkout.cart.shipping" as="shipping" template="checkout/cart/shipping.phtml"/> -->
<block type="checkout/cart_crosssell" name="checkout.cart.crosssell" as="crosssell" template="checkout/cart/crosssell.phtml"/>
<block type="checkout/cart_totals" name="checkout.cart.totals" as="totals" template="checkout/cart/totals.phtml"/>
</block>
</reference>
<block type="core/text_list" name="additional.product.info" translate="label">
<label>Additional Product Info</label>
</block>
</checkout_cart_index>
<checkout_cart_configure translate="label">
<label>Configure Cart Item</label>
<update handle="catalog_product_view"/>
<reference name="product.info">
<block type="checkout/cart_item_configure" name="checkout.cart.item.configure.block"></block>
</reference>
</checkout_cart_configure>
<!--
Multi address shipping checkout main layout,
will be rendered on all checkout pages
-->
<checkout_multishipping translate="label">
<label>Multishipping Checkout</label>
<!-- Mage_Checkout -->
<remove name="right"/>
<remove name="left"/>
<reference name="root">
<action method="setTemplate"><template>page/1column.phtml</template></action>
</reference>
<reference name="content">
<block type="checkout/multishipping_state" name="checkout_state" template="checkout/multishipping/state.phtml"/>
</reference>
</checkout_multishipping>
<checkout_multishipping_login>
<update handle="customer_account_login"/>
</checkout_multishipping_login>
<checkout_multishipping_register>
<update handle="customer_account_create"/>
</checkout_multishipping_register>
<!--
Multi address shipping checkout selection of address per item page
-->
<checkout_multishipping_address_select translate="label">
<label>Multishipping Checkout Shipping Address Selection</label>
<update handle="checkout_multishipping"/>
<!-- Mage_Checkout -->
<reference name="content">
<block type="checkout/multishipping_address_select" name="checkout_address_select" template="checkout/multishipping/address/select.phtml"/>
</reference>
</checkout_multishipping_address_select>
<checkout_multishipping_address_selectbilling translate="label">
<label>Multishipping Checkout Billing Address Selection</label>
<update handle="checkout_multishipping"/>
<!-- Mage_Checkout -->
<reference name="content">
<block type="checkout/multishipping_address_select" name="checkout_address_select" template="checkout/multishipping/address/select.phtml"/>
</reference>
</checkout_multishipping_address_selectbilling>
<checkout_multishipping_address_newshipping translate="label">
<label>Multishipping Checkout Shipping Address Creation</label>
<update handle="checkout_multishipping"/>
<update handle="checkout_multishipping_customer_address"/>
</checkout_multishipping_address_newshipping>
<checkout_multishipping_address_newbilling translate="label">
<label>Multishipping Checkout Billing Address Creation</label>
<update handle="checkout_multishipping"/>
<update handle="checkout_multishipping_customer_address"/>
</checkout_multishipping_address_newbilling>
<checkout_multishipping_address_editshipping translate="label">
<label>Multishipping Checkout Shipping Address Edit Form</label>
<update handle="checkout_multishipping"/>
<update handle="checkout_multishipping_customer_address"/>
</checkout_multishipping_address_editshipping>
<checkout_multishipping_address_editaddress>
<update handle="checkout_multishipping"/>
<update handle="checkout_multishipping_customer_address"/>
</checkout_multishipping_address_editaddress>
<checkout_multishipping_address_editbilling translate="label">
<label>Multishipping Checkout Billing Address Edit Form</label>
<update handle="checkout_multishipping"/>
<update handle="checkout_multishipping_customer_address"/>
</checkout_multishipping_address_editbilling>
<checkout_multishipping_customer_address translate="label">
<label>Multishipping Checkout Customer Address Edit Form</label>
<reference name="content">
<block type="customer/address_edit" name="customer_address_edit" template="customer/address/edit.phtml"/>
</reference>
</checkout_multishipping_customer_address>
<!--
Multi address shipping checkout address page
-->
<checkout_multishipping_addresses translate="label">
<label>Multishipping Checkout Address (Any) Form</label>
<update handle="checkout_multishipping"/>
<!-- Mage_Checkout -->
<reference name="content">
<block type="checkout/multishipping_addresses" name="checkout_addresses" template="checkout/multishipping/addresses.phtml">
<action method="addItemRender"><type>default</type><block>checkout/cart_item_renderer</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/multishipping/item/default.phtml</template></action>
</block>
</reference>
</checkout_multishipping_addresses>
<!--
Multi address shipping checkout shipping information
-->
<checkout_multishipping_shipping translate="label">
<label>Multishipping Checkout Shipping Information Step</label>
<update handle="checkout_multishipping"/>
<!-- Mage_Checkout -->
<reference name="content">
<block type="checkout/multishipping_shipping" name="checkout_shipping" template="checkout/multishipping/shipping.phtml">
<action method="addItemRender"><type>default</type><block>checkout/cart_item_renderer</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/multishipping/item/default.phtml</template></action>
<block type="checkout/multishipping_billing_items" name="checkout_billing_items" template="checkout/multishipping/billing/items.phtml">
<action method="addItemRender"><type>default</type><block>checkout/cart_item_renderer</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/multishipping/item/default.phtml</template></action>
</block>
</block>
</reference>
</checkout_multishipping_shipping>
<!--
Multi address shipping checkout billing information
-->
<checkout_multishipping_billing translate="label">
<label>Multishipping Checkout Billing Information Step</label>
<update handle="checkout_multishipping"/>
<!-- Mage_Checkout -->
<reference name="content">
<block type="checkout/multishipping_billing" name="checkout_billing" template="checkout/multishipping/billing.phtml">
<action method="setMethodFormTemplate"><method>purchaseorder</method><template>payment/form/purchaseorder.phtml</template></action>
<!--<block type="checkout/multishipping_billing_items" name="checkout_billing_items" template="checkout/multishipping/billing/items.phtml">
<action method="addItemRender"><type>default</type><block>checkout/cart_item_renderer</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/multishipping/item/default.phtml</template></action>
</block>-->
</block>
</reference>
</checkout_multishipping_billing>
<!--
Multi address shipping checkout overview
-->
<checkout_multishipping_overview translate="label">
<label>Multishipping Checkout Overview</label>
<update handle="checkout_multishipping"/>
<!-- Mage_Checkout -->
<reference name="content">
<block type="checkout/multishipping_overview" name="checkout_overview" template="checkout/multishipping/overview.phtml">
<action method="addItemRender"><type>default</type><block>checkout/cart_item_renderer</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/multishipping/item/default.phtml</template></action>
<action method="addRowItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/multishipping/overview/item.phtml</template></action>
<action method="addRowItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/multishipping/overview/item.phtml</template></action>
<block type="checkout/multishipping_payment_info" name="payment_info">
<action method="setInfoTemplate"><method></method><template></template></action>
</block>
<block type="checkout/agreements" name="checkout.multishipping.agreements" as="agreements" template="checkout/multishipping/agreements.phtml"/>
<block type="checkout/cart_totals" name="totals" />
<block type="core/text_list" name="checkout.multishipping.overview.items.after" as="items_after" translate="label">
<label>Overview Items After</label>
</block>
</block>
</reference>
</checkout_multishipping_overview>
<!--
Multi address shipping checkout success
-->
<checkout_multishipping_success translate="label">
<label>Multishipping Checkout Success</label>
<update handle="checkout_multishipping"/>
<!-- Mage_Checkout -->
<reference name="content">
<block type="checkout/multishipping_success" name="checkout_success" template="checkout/multishipping/success.phtml"/>
</reference>
</checkout_multishipping_success>
<!--
One page checkout main layout
-->
<checkout_onepage_index translate="label">
<label>One Page Checkout</label>
<!-- Mage_Checkout -->
<remove name="left"/>
<reference name="root">
<action method="setTemplate"><template>page/2columns-right.phtml</template></action>
</reference>
<reference name="right">
<action method="unsetChildren"></action>
<block type="page/html_wrapper" name="checkout.progress.wrapper" translate="label">
<label>Checkout Progress Wrapper</label>
<action method="setElementId"><value>checkout-progress-wrapper</value></action>
<block type="checkout/onepage_progress" name="checkout.progress" before="-" template="checkout/onepage/progress.phtml"/>
</block>
</reference>
<reference name="content">
<block type="checkout/onepage" name="checkout.onepage" template="checkout/onepage.phtml">
<!--block type="checkout/onepage_login" name="checkout.onepage.login" as="login" template="checkout/onepage/login.phtml"-->
<block type="page/html_wrapper" name="checkout.onepage.login.before" as="login_before" translate="label">
<label>Login/Registration Before</label>
<action method="setMayBeInvisible"><value>1</value></action>
</block>
</block>
<block type="checkout/onepage_billing" name="checkout.onepage.billing" as="billing" template="checkout/onepage/billing.phtml"/>
<block type="checkout/onepage_shipping" name="checkout.onepage.shipping" as="shipping" template="checkout/onepage/shipping.phtml"/>
<block type="checkout/onepage_shipping_method" name="checkout.onepage.shipping_method" as="shipping_method" template="checkout/onepage/shipping_method.phtml">
<block type="checkout/onepage_shipping_method_available" name="checkout.onepage.shipping_method.available" as="available" template="checkout/onepage/shipping_method/available.phtml"/>
<block type="checkout/onepage_shipping_method_additional" name="checkout.onepage.shipping_method.additional" as="additional" template="checkout/onepage/shipping_method/additional.phtml"/>
</block>
<block type="checkout/onepage_payment" name="checkout.onepage.payment" as="payment" template="checkout/onepage/payment.phtml">
<block type="checkout/onepage_payment_methods" name="checkout.payment.methods" as="methods" template="checkout/onepage/payment/methods.phtml">
<action method="setMethodFormTemplate"><method>purchaseorder</method><template>payment/form/purchaseorder.phtml</template></action>
</block>
</block>
<block type="checkout/onepage_review" name="checkout.onepage.review" as="review" template="checkout/onepage/review.phtml"/>
</block>
</reference>
</checkout_onepage_index>
<!--
One page checkout progress block
-->
<checkout_onepage_progress>
<!-- Mage_Checkout -->
<remove name="right"/>
<remove name="left"/>
<block type="checkout/onepage_progress" name="root" output="toHtml" template="checkout/onepage/progress.phtml">
<block type="checkout/onepage_payment_info" name="payment_info">
<action method="setInfoTemplate"><method></method><template></template></action>
</block>
</block>
</checkout_onepage_progress>
<!--
One page checkout payment methods block
-->
<checkout_onepage_paymentmethod>
<remove name="right"/>
<remove name="left"/>
<block type="checkout/onepage_payment_methods" name="root" output="toHtml" template="checkout/onepage/payment/methods.phtml">
<action method="setMethodFormTemplate"><method>purchaseorder</method><template>payment/form/purchaseorder.phtml</template></action>
</block>
</checkout_onepage_paymentmethod>
<!--
One page checkout shipping methods block
-->
<checkout_onepage_shippingmethod>
<!-- Mage_Checkout -->
<remove name="right"/>
<remove name="left"/>
<block type="checkout/onepage_shipping_method_available" name="root" output="toHtml" template="checkout/onepage/shipping_method/available.phtml"/>
</checkout_onepage_shippingmethod>
<checkout_onepage_additional>
<!-- Mage_Checkout -->
<remove name="right"/>
<remove name="left"/>
<block type="checkout/onepage_shipping_method_additional" name="root" output="toHtml" template="checkout/onepage/shipping_method/additional.phtml">
<action method="setDontDisplayContainer"><param>1</param></action>
</block>
</checkout_onepage_additional>
<!--
One page checkout order review block
-->
<checkout_onepage_review translate="label">
<label>One Page Checkout Overview</label>
<!-- Mage_Checkout -->
<remove name="right"/>
<remove name="left"/>
<block type="checkout/onepage_review_info" name="root" output="toHtml" template="checkout/onepage/review/info.phtml">
<action method="addItemRender"><type>default</type><block>checkout/cart_item_renderer</block><template>checkout/onepage/review/item.phtml</template></action>
<action method="addItemRender"><type>grouped</type><block>checkout/cart_item_renderer_grouped</block><template>checkout/onepage/review/item.phtml</template></action>
<action method="addItemRender"><type>configurable</type><block>checkout/cart_item_renderer_configurable</block><template>checkout/onepage/review/item.phtml</template></action>
<block type="checkout/cart_totals" name="checkout.onepage.review.info.totals" as="totals" template="checkout/onepage/review/totals.phtml"/>
<block type="core/text_list" name="checkout.onepage.review.info.items.before" as="items_before" translate="label">
<label>Items Before</label>
</block>
<block type="core/text_list" name="checkout.onepage.review.info.items.after" as="items_after" translate="label">
<label>Items After</label>
</block>
<block type="checkout/agreements" name="checkout.onepage.agreements" as="agreements" template="checkout/onepage/agreements.phtml"/>
<block type="core/template" name="checkout.onepage.review.button" as="button" template="checkout/onepage/review/button.phtml"/>
</block>
</checkout_onepage_review>
<checkout_onepage_success translate="label">
<label>One Page Checkout Success</label>
<reference name="root">
<action method="setTemplate"><template>page/2columns-right.phtml</template></action>
</reference>
<reference name="content">
<block type="checkout/onepage_success" name="checkout.success" template="checkout/success.phtml"/>
</reference>
</checkout_onepage_success>
<checkout_onepage_failure translate="label">
<label>One Page Checkout Failure</label>
<reference name="root">
<action method="setTemplate"><template>page/2columns-right.phtml</template></action>
</reference>
<reference name="content">
<block type="checkout/onepage_failure" name="checkout.failure" template="checkout/onepage/failure.phtml"/>
</reference>
</checkout_onepage_failure>
<block type="core/list" name="additional.product.info"/>
</layout>