Public bug reported: Binary package hint: ubuntu-artwork
This is a bug related to Ubuntu's window border styles. Most maxmised windows will have the titlebar fill both top corners of the screen (excluding the panel), making the titlebar appear a solid bar right across. I beleive this is the proper appearance. Some windows however, will leave tiny (5x5) transparent arcs in the corners. These may appear as white/gray (from a maximised inactive window behind it) or black/brown (from ubuntu's desktop colour behind it). It's probably safe to assume these tiny arcs are residing from Ubuntu's rounded corners of unmaximised windows. You can see a screenshot of the correct bahaviour here: http://schalken.wubbles.net/corner-right.png And a screenshot of the problematic bahaviour here: http://schalken.wubbles.net/corner-wrong.png and here http://schalken.wubbles.net/corner-wrong2.png This may be an application-independant issue. In this case the following are programs i have verified to cause the problem: Synaptic Gaim chat window while these don't (or didn't when I tested them) Epiphany Firefox Gedit Gimp ** Affects: ubuntu-artwork (Ubuntu) Importance: Untriaged Status: Unconfirmed -- tiny transparent arcs in top corners of maximised window https://launchpad.net/bugs/56961 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs