Comment 4 for bug 512615

Confirming bug in Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a1) Gecko/20061208 Minefield/3.0a1.

Further investigation shown that Cairo selects the wrong contrast level when rendering the text. Setting contrast to 1.0 using ClearType fixes the issue (although text will likely to look weird in other places if that is set). Probably Cairo incorrectly reads the contrast values and takes them as if they were squared (e.g. a level of 1.4 is treated as 1.4^2, that's around 2.0, while 1.0 is processed as 1,0^2=1.0). Another thing I noticed is that if you hover over the menu items, the bug disappears, but opening a submenu causes it to re-appear. Testcase coming soon.