Okay, this one is a wierd one. The patch I've submitted for bug #8983 seems to correct the maximize/minimize and bottom right resize and moving events, however resizing the window from any other corner other than the bottom right does not throw the event.  I don't know at this stage if this is related to the windowmanager handling, X, or Xsharp.

Xsharp isn't passing on x,y changes during resize events, like maximize, which change the top/left location of a top-level window. I tracked it out from winforms as far as DrawingTopLevelWindow::IToolkitWindow::MoveResize and DrawingTopLevelWindow::OnMoveResize. The x,y values at that point are unchanging unless an actual move of the window is made. The attached test-case (from djlogan) shows a symptom of the problem; when the resize changes the x,y position, the menu pops up in the pre-resize x,y position.