我在 IntelliJ Idea 12 中使用 Scala 插件。我想知道，为什么 scala 图标不出现，而 java 图标却出现？我的其他项目也是如此。
以前在 Ubuntu 12 上没问题（现在我使用的是 Ubuntu 13）。
这是idea.log的一个例外：
2
013-09-24 12:20:32,818 [ 4599] ERROR - .components.ComponentStoreImpl - Conflicting component name 'SbtSettings': class org.jetbrains.sbt.settings.SbtApplicationSettings and class net.orfjackal.sbt.plugin.settings.SbtApplicationSettingsComponent
java.lang.Throwable
at com.intellij.openapi.diagnostic.Logger.error(Logger.java:54)
at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.a(ComponentStoreImpl.java:202)
at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.a(ComponentStoreImpl.java:269)
at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.access$000(ComponentStoreImpl.java:44)
at com.intellij.openapi.components.impl.stores.ComponentStoreImpl$1.run(ComponentStoreImpl.java:84)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:929)
at com.intellij.openapi.components.impl.stores.ComponentStoreImpl.initComponent(ComponentStoreImpl.java:81)
at com.intellij.openapi.application.impl.ApplicationImpl.initializeComponent(ApplicationImpl.java:208)
at com.intellij.openapi.components.impl.ComponentManagerImpl.b(ComponentManagerImpl.java:215)
at com.intellij.openapi.components.impl.ComponentManagerImpl.access$1300(ComponentManagerImpl.java:55)
at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter$1.getComponentInstance(ComponentManagerImpl.java:587)
at com.intellij.openapi.components.impl.ComponentManagerImpl$ComponentConfigComponentAdapter.getComponentInstance(ComponentManagerImpl.java:630)
at com.intellij.util.pico.DefaultPicoContainer.getLocalInstance(DefaultPicoContainer.java:242)
at com.intellij.util.pico.DefaultPicoContainer.getInstance(DefaultPicoContainer.java:229)
at com.intellij.util.pico.DefaultPicoContainer.getComponentInstance(DefaultPicoContainer.java:211)
at org.picocontainer.alternatives.AbstractDelegatingMutablePicoContainer.getComponentInstance(AbstractDelegatingMutablePicoContainer.java:75)
at com.intellij.openapi.components.impl.ComponentManagerImpl.createComponent(ComponentManagerImpl.java:127)
at com.intellij.openapi.application.impl.ApplicationImpl.createComponent(ApplicationImpl.java:412)
at com.intellij.openapi.components.impl.ComponentManagerImpl.a(ComponentManagerImpl.java:108)
at com.intellij.openapi.components.impl.ComponentManagerImpl.initComponents(ComponentManagerImpl.java:346)
at com.intellij.openapi.components.impl.stores.ApplicationStoreImpl.load(ApplicationStoreImpl.java:82)
at com.intellij.openapi.application.impl.ApplicationImpl.load(ApplicationImpl.java:543)
at com.intellij.idea.IdeaApplication.run(IdeaApplication.java:197)
at com.intellij.idea.MainImpl$2.run(MainImpl.java:141)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
at com.intellij.ide.IdeEventQueue.d(IdeEventQueue.java:700)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:525)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:348)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
2013-09-21 12:20:32,821 [ 4602] ERROR - .components.ComponentStoreImpl - IntelliJ IDEA 12.1.3 Build #IU-129.451
2013-09-21 12:20:32,821 [ 4602] ERROR - .components.ComponentStoreImpl - JDK: 1.7.0_25
2013-09-21 12:20:32,821 [ 4602] ERROR - .components.ComponentStoreImpl - VM: Java HotSpot(TM) 64-Bit Server VM
2013-09-21 12:20:32,821 [ 4602] ERROR - .components.ComponentStoreImpl - Vendor: Oracle Corporation
2013-09-21 12:20:32,821 [ 4602] ERROR - .components.ComponentStoreImpl - OS: Linux