Comment 7 for bug 1038785

I'm going to bring this to the Ninja team, to anyone who wants to help me troubleshoot this.

I bet the problem is related to Compiz's grid plugin. Seems to me that when you right-snap a window, the size of the window exceeds the size of the desktop by one or two pixels. Thats enough to wrap contents to another workspace and trick Unity to think the window is misplaced.