Thanks for your help, Pete While your example does indeed fix the problem that my example code showed, unfortunately, when plugging it in to the real program, the problem persists.
However, I have been able to reproduce this bug using just Designer. On Windows here,...run Designer Create a MainWindow (default one do) Drop in a QFrame and pull it to just shy of MainWindow Drop in a QDockWidget Select dockWidget Cut Select QFrame Paste and then "run it" doing a Form->Preview, ...clicked "undock" button, behaviour is Normal Did the same thing on Linux, but when I click the "undock" button, the button is stuck at top, just like our problem. Can anyone else confirm this on Linux ? So that's definitely gotta be a Qt bug, right? Any advice about how to fix ? Thanks! -- View this message in context: http://python.6.n6.nabble.com/QDockWidget-issue-in-Linux-but-not-Windows-OSX-tp4374122p4466498.html Sent from the PyQt mailing list archive at Nabble.com. _______________________________________________ PyQt mailing list PyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt