I can see how that is annoying. The same problem poses in Office 2010, it has some shortcuts on the left.
To be honest, I think moving the hotspot to the right side really is not a fix, if you have lots of tabs the problem returns. Have you tried using the middle mouse button method? (it works on the whole window!) How about moving to the edge?
I'm really sad that apps are starting to not respect the general interface in windows, and I feel like I should find a better way of launching GridMove, but I'm really out of ideas