I have the exact same problem. Though I can easily reproduce the problem (the problem seems to not depend on which website you are viewing, as it has appeared on launchpad and the ubuntu wiki sometimes, but not others) when I hit the screenshot key, the the problem goes away.
Running Firefox 3.0.14, on Ubuntu 9.04, amd64, on kernel 2.6.28-16-generic with ATI fglrx drivers. -- firefox black background on frames, divs https://bugs.launchpad.net/bugs/425714 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs