Effects Rewrite: add IE8 CANTFIX note to clip effect test

Author: mikesherov

tests/visual/effects/clip.html

@@ -70,6 +70,7 @@
 <p>EXPECTED: Clicking "Toggle" or "Effect Toggle" a second time reverses the animation, first showing all elements at their original dimensions, and restoring them to their original state.</p>
 <p>EXPECTED: Clicking "Effect Default" should always perform a "hide" animation.</p>
 <p>EXPECTED: Clicking any of the buttons in quick succession should queue the relevant animations.</p>
+<p>EXPECTED CANTFIX: In IE8, the clip animation jumps due to a bug that causes .css('clip') to return undefined unless the clip property is an inline style.</p>
 
 <div class="container">
 	<button class="toggle">Toggle</button>