I'm currently trying out the adblockplus-0.7.2.4+.2007032103-en-US.xpi build with E.H.H. 1.0.1 in Firefox 2.0.0.3.
The website is here: http://www.shrinemaiden.com/BBS/index.php
When I activate E.H.H. and place the cursor just below the 'Other Games' text, the size/position related attributes suddenly go berserk and constantly change values.
Like this a few moments later, 'width' has increased to 1401 px, 'left' has decreased to -350 px, 'top' constantly jumps between 741-743 px. And a horisontal scrollbar is made in the Firefox window.
The mouse cursor has to be positioned very precisely for this variable weirdness to occur. If I move the cursor 1 pixel up or down, the same element is still marked but the number jumping will pause at their current value, then the numbers continue changing when I move the cursor 1 pixel back.
And additionally these value changes actually effects the values generated in the rule composing menu.