I can reproduce the bug in 16.04 using LibreOffice, same as your screenshots show. But I can't seem to reproduce the bug in Firefox, Thunderbird or GIMP that you mention. Can you provide screenshots of those with the bug?
I can reproduce the bug in 16.04 using LibreOffice, same as your screenshots show. But I can't seem to reproduce the bug in Firefox, Thunderbird or GIMP that you mention. Can you provide screenshots of those with the bug?