I usually encounter this when I have a range of tabs open and want to close them (but make sure to check if I really don't need one of them still). My native window manager is ion3 and browser version is Debian-2.0.0.1+dfsg-2. I'm fairly sure it also happens on windows though, I'll get back to you when I've reproduced that and am entirely sure.
-- could not close window with ctrl-W until I clicked on the background https://launchpad.net/bugs/83229 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
