A preliminary patch log has been posted over at NoGrip :
Bugs fixed in PS3/360 DLC title update (even though this a PC patch update thread )
(this is unofficial and there's probably a few things I missed - the PC patch obviously includes all these fixes)
- Input processing, tweaked default wheel settings and fixed force muting problem. Addresses wheel lag/feel issues. (somewhat understated - a large code change to reduce latency is included improve both input and wheel animation delay)
- Fix Upgrade / garage screen crash / hang.
- Fix Logitech FFB.
- Fix tech hang on vehicle selection if own loaner car and it's upgraded it past initial class.
- Fix occasional logic flaw for redeeming voucher codes.
- Fix restarting or quitting a race while slow motion is active in replay
- Improved validation of lap times, scores and speeds:
- Fix don't report unrealistic records to stat servers.
- Fix don't store unrealistic records to profile if playing online.
- Fix : Reset unrealistic stats stored in the profile after successful signin.
- Fix : All constants controlling record validation can be overridden from server-side config.
- Fix drift scores above 3600 not appearing in Records.
- Fix : Don't send lap times in game reports when playing drift (fixes issue with Nevada Circle Night track sharing leaderboard id with Asia Drag Strip)
http://www.nogripracing.com/forum/showpost.php?p=1355653&postcount=880
Downside is the MLAA from Intel didn't make it into this patch :
" Unfortunately the AA 'fix' didn't make it into the patch, because the MLAA code from Intel had to be reviewed by their legal dept and that took some time - they were providing this code a full month ahead of it's Intel website release date, so it was just tight timing. "