Ubuntu 17.10 titlebar height: 33px Ubuntu 18.04 titlebar height: 42px Measured with default density and drag space disabled. The 9px taller titlebar effectively adds a drag space to all windows, even maximized windows where it would not normally appear. The drag space option has no useful effect.
Yes, I can also see that on Fedora 29 with Ambiance theme.
Ubuntu 18.10's new default Yaru theme does not have this issue.
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