When the window I dispay the document in is close to maximized size, the table cell on the left side of the above URL is way too thin, so only the bullets of the topmost list show up. Most of the navigation cell disappears. If you aren't seeing this, I can send you a screenshot/more info.

Yes, I see this too. (I had noticed a similar problem on mozilla.org yesterday). I believe that this is not a new problem in the tables code; rather, mozilla.org has changed something in their template that now triggers a known bug. That known bug is bug #1302 ("over-specified colspans") but I haven't fully convinced myself that this bug and 1302 are truly one and the same (will look some more). [I suppose in the interim, if/when I do confirm this, it would be good idea to get mozilla.org's template modified to avoid this bug. Who is the point person for the website?]

So, it is not the _same_ bug as bug 1302, but it is COLSPAN related. It just seems to be a problem with distributing auto width to COLSPAN'd columns. (At least the test case shows this. I couldn't really find a way to 'patch' the mozilla.org page).

*** Bug 6951 has been marked as a duplicate of this bug. ***

*** Bug 6969 has been marked as a duplicate of this bug. ***

See also bug #6634 and bug #6697 which may (or may not) be related to this problem. (These bugs reference on X-window painting bug when scrolling right but occur (recently) on http://www.mozilla.org/quality/smoketests/).

fixed with latest checkin.

*** Bug 7219 has been marked as a duplicate of this bug. ***

*** Bug 7390 has been marked as a duplicate of this bug. ***

Using 6/3 build, verified bug fixed.