If I zoom in and slide my mouse on this rectangles someone of them will stay half-capacity. How can it to fix, to have got ideal situation, as it would be if slide mouse slowly. For example code like this, open with FireFox:
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
</head>
<body>
<svg version="1.1" xmlns:x="&ns_extend;" xmlns:i="&ns_ai;" xmlns:graph="&ns_graphs;"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:a="http://ns.adobe.com/adobesvgviewerextensions/3.0/"
x="0px" y="0px" width="800" height="600" viewBox="-400 -300 800 600" xml:space="preserve" font-family="arial" font-size="14">
<defs>
<g id="switcher" cursor="pointer" stroke-width="0.1">
<rect x="-0.5" y="-0.5" width="1" height="1" fill="white">
<!--it scales a few times after change committed to this element -->
<animateTransform attributeType="XML" attributeName="transform" type="scale" dur="0.5s" keyTimes="0;0.5;0.5;1" values="1;1.02;1.02;1" repeatCount="3" fill="freeze"/>
<!--it animates scale up and scale down onclick -->
<animateTransform attributeName="transform" attributeType="XML"
type="scale" from="1" to="1.15" repeatCount="1" begin="mousedown+0.2s" dur = "0.2s"
fill="freeze"/>
<animateTransform attributeName="transform" attributeType="XML"
type="scale" from="1.15" to="1" repeatCount="1" begin="mouseup+0.4s" dur = "0.2s"
fill="freeze"/>
<!--it makes half-visible selecting effect -->
<set attributeName="stroke-opacity" begin="mouseover" end="mouseout" to="0.5"/>
</rect>
</g>
</defs>
<line x1="-200" y1="0" x2="200" y2="0" stroke-width="1" stroke="blue" />
<line x1="0" y1="200" x2="0" y2="-200" stroke-width="1" stroke="blue" />
<line x1="-200" y1="200" x2="200" y2="200" stroke-width="1" stroke="blue" />
<line x1="-200" y1="-200" x2="200" y2="-200" stroke-width="1" stroke="blue" />
<g transform="translate(0,-200)" >
<g transform="scale(100,100)" fill="green" stroke="green" stroke-width="0.05" >
<use xlink:href="#switcher" />
</g>
</g>
<g transform="translate(-200,-200)" >
<g transform="scale(100,100)" fill="green" stroke="green" stroke-width="0.05" >
<use xlink:href="#switcher" />
</g>
</g>
<g transform="translate(200,-200)" >
<g transform="scale(100,100)" fill="green" stroke="green" stroke-width="0.05" >
<use xlink:href="#switcher" />
</g>
</g>
<g transform="translate(0,0)" >
<g transform="scale(100,100)" fill="green" stroke="green" stroke-width="0.05" >
<use xlink:href="#switcher" />
</g>
</g>
<g transform="translate(-200,0)" >
<g transform="scale(100,100)" fill="green" stroke="green" stroke-width="0.05" >
<use xlink:href="#switcher" />
</g>
</g>
<g transform="translate(200,0)" >
<g transform="scale(100,100)" fill="green" stroke="green" stroke-width="0.05" >
<use xlink:href="#switcher" />
</g>
</g>
</svg>
</body>