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
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tiny transparent arcs in top corners of maximised window
https://launchpad.net/bugs/56961
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