Ah, i think i found the answer. Start metacity before you take a screenshot
$ metacity --replace & $ shutter
-> Corners are transparent
Switch to metacity AFTER you started shutter
$ compiz --replace & $ shutter $ metacity --replace &
-> And you'll get opaque window corners
Ah, i think i found the answer. Start metacity before you take a screenshot
$ metacity --replace &
$ shutter
-> Corners are transparent
Switch to metacity AFTER you started shutter
$ compiz --replace &
$ shutter
$ metacity --replace &
-> And you'll get opaque window corners