I'm surprised if Fences would eff up anything at all. Currently I have 20 games showing as icons [in Fences] and none has an issue of any kind.
They range from Spider Solitaire to Doom 3, Quake 4, COD 4, Far Cry 2, TestDrive Unlimited....you name it.
Even the Benchmarking Demo for Resident Evil 5 ....and that zings along at a framerate of 103 at 1680x1050 ...
I'd be guessing it's more an issue of an old Graphic driver than anything to do with Fences...