Solving this, may also solve the following bug https://bugzilla.mozilla.org/show_bug.cgi?id=112958 I submitted mine as seperate because the bug 112958 seemed to assume it was an issue with GTK.
This is not a recent regression. I can see the bug with Mozilla1.7 and Mozilla1.4.
I can't reproduce this with a GTK1 build, even with NS_PAINT_SEPARATELY defined. Martijn, do you have a debug build? If so, could you enable paint flashing and see whether we're repainting the areas where the turds get left?
Created attachment 173246 [details] Testcase Maybe you're seeing it with this? Otherwise it may depend on the font you use. Probably the same issue as bug 96041, not?
Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8b) Gecko/20050203 Firefox/1.0+ I am seeing this with the test case (but not the original case)
Setting bug status to confirmed, as I see this with the current Seamonkey trunk build on Windows XP.