I have Win 7 64 bit and I have no problems whatsoever with Fences Pro. I use it in combination with Deskscapes, DesktopX ,Winstep, WinFX, CursorFX, Windowblinds, Icon Packager, and more, all at the same time with no problems with any of them.
How much other stuff do you have running?
Do you have Impulse installed and can you use it to verify the fences install?
I am unsure, will look into that, referring to impulse.
I am not running much, I keep the pc stream lined for video games so it should be fine, must be some video card conflict or something. What i see is when i scroll the mouse while holding the frame the mouse moves faster and then the frame catches up and often times overshoots my location. it is not hindering anything since i rarely need to re-size, just thought i would ask.