From Ben Collins:
"B) This is proprietary software. We have no control over what the vendor does. We do our best, but these are the breaks. If you don't like this sort of thing happening, complain to nVidia, not us. We didn't decide to drop support for the chipsets in question. We just provided the latest two drivers that nVidia had available on their web site (7184 and 9755). If they had posted links to three drivers, we'd have provided that from the beginning."
So for everyone complaining about problems with Feisty and 1.0-9631, you can blame nVidia for never fixing their Unix Drivers Portal Page: