All the widgets for the menus are in overlays. This includes the standard Motif widgets as well. This is why you get corruption on cards with only one overlay available (ie. consumer "game" oriented cards.) This topic has been beaten to death on the Maya forums and they specifically called out GeForce users in one of their hardware FAQs (I think it was when Unlimited v5 came out. I guess the support staff was a bit miffed at the time.) Either emulate planes in software or use a DCC class card (that is on the Qualified HW list) or A/W won't even talk to you.
on the Maya forums seems relevant.