Just noticed this, not sure if it was in another beta, but I would think I'd have seen it. In this beta when I right click and bring up a menu and then click and drag to the submenu I want, I get the giant "1" indicating DisplayFusion thinks I'm dragging the titlebar of the application to another monitor. The program that I have been seeing this in is Visual Studio .NET 2003. Its pretty annoying, and I figure its due to one of those recent changes for compatibility.

Windows XP SP3

Looks like that fixed it.