Just in case you do not get my e-mail or someone else was interested in the resolution to this problem.
In the Common controls of the filter set Reduce flicker to 1-2-1 and Field rendering to optimized for quality. This resolves the issue on our end. Let me know if this helps.
Did you have to install a driver for the mouse? It is a wireless mouse correct?
What I would try to do is remove the driver for that mouse and hookup a standard USB mouse to rule out a driver conflict, I’ve seen Wacom tablet drivers cause issues with Red before so it would be nice to rule it out.
Get info on your boot drive and make sure you are set as the “Owner”. I don’t have access to Snow Leopard right now so I can’t give you the exact steps.
I’ve seen this resolve the issue in the past though.
Just to make sure I am clear you are trying to resize windows but the arrow will not ungrab one you release the click? Is that correct?
Are you using any devices on the machine like a track ball or wacom tablet? Or have you? What have you done between the reinstall when it worked and when it stopped working?