I'm unable to replicate this with VMWare Fusion 4.1.1 and a Windows 7 VM running in unity mode. I do see it if set the VM to single window mode. If I turn off "Enhance pointer position" in the Windows 7 Mouse control panel, it seems to change the behavior a bit.

Oh, random other tidbits about my VMWare setup, in Preferences (for all of VMWare) under Keyboard & Mouse, I have Secondary button turned off. (This is where VMWare will send a context click if I'm holding control and click. I can already do this without control, so it just tended to cause issues). I also changed the setting on the VM under USB & Bluetooth to not share Bluetooth devices. When Windows booted, it enjoyed disconnecting my Bluetooth keyboard and mouse for a bit before reconnecting.