I can't get access to your screen as my work blocks it... but could it be that it is due to a scrollbar appearing in the RH side of the browser when you open the menu?
There is a workaround for this, which is to place
Code:
html { overflow: scroll; }
at the start of your css file. It means that scrollbars will always appear on the page, whether you need them or not. It's not a great fix but there aren't many options.
If that's not the problem, maybe you can describe a bit more? I had a page load flicker, which I described here: http://www.dynamicdrive.com/forums/s...ad.php?t=50472.
The fix is also described on that thread.
Hope that helps!
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