I can confirm the problem on Xubuntu 13.04 with gtk-window-decorator. Workaround for me:
1. Unmaximize the affected window 2. Adjust the window size to fill the screen 3. Never maximize it again :)
Which has the disadvantage that the window is always quasi-fullscreen, but for most of the cases this is not a big loss.
I can confirm the problem on Xubuntu 13.04 with gtk-window- decorator. Workaround for me:
1. Unmaximize the affected window
2. Adjust the window size to fill the screen
3. Never maximize it again :)
Which has the disadvantage that the window is always quasi-fullscreen, but for most of the cases this is not a big loss.