This bug was fixed in the package xfwm4 - 4.10.1-2ubuntu2
--------------- xfwm4 (4.10.1-2ubuntu2) trusty; urgency=low
* Add patch from XFCE bugzilla to fix fullscreen behavior with Qt based apps (LP: #1066535) -- Mario Limonciello <email address hidden> Tue, 03 Dec 2013 15:24:16 -0600
This bug was fixed in the package xfwm4 - 4.10.1-2ubuntu2
---------------
xfwm4 (4.10.1-2ubuntu2) trusty; urgency=low
* Add patch from XFCE bugzilla to fix fullscreen behavior with Qt
based apps (LP: #1066535)
-- Mario Limonciello <email address hidden> Tue, 03 Dec 2013 15:24:16 -0600