I have heard a rumor that this may have been encountered by Debian, and that it only appears in systems that have been upgraded (i.e. not clean installs), and also that the bug is actually due to xorg and gtk miscommunicating.
So far I have been unable to find any proof of this: mailing list messages, debian bugtracker entries, etc. -- Gimp brushes leave garbage pixel trails https://bugs.launchpad.net/bugs/156556 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs