There are still problems with Xconfigurator's handling of I128 cards during kickstart. (Bug 1517 describes similiar problems and claims to have resolved them on 3/23.) The xconfig part of the kickstart fails, and a manual configuration is necessary. The problem was that it wasn't looking at the I128 entry in the card database, which would tell it to not autoprobe. To fix this, I had to change the "Riva 128" entry in the pci-ids.h file from Server:SVGA to Card:RIVA128 (I entered a URL for a context diff in the URL box of this bug report). After applying the patch, I got kickstart to work.
This issue has been forwarded to a developer for further action.
Matt, can you please take a look at this?
this should be fixed in the next Xconfigurator (4.2.6) which will be in the next Raw Hide release.