Are there any? If so, list them here.

All of the mods from my "must have mods" thread work with version S or T. All of the texture mods in the list will work with version U. I imagine that Kegetys will update Ghostcar, Pitspotter, etc to work with version U really quickly, since he's always on top of that stuff.

http://www.lfsforum.net/showthread.php?t=7174

Quote from Cue-Ball :

All of the mods from my "must have mods" thread work with version S or T. All of the texture mods in the list will work with version U. I imagine that Kegetys will update Ghostcar, Pitspotter, etc to work with version U really quickly, since he's always on top of that stuff.

http://www.lfsforum.net/showthread.php?t=7174

Well, I can confirm that Pitstopper works with the latest patch. I installed it right after T came out and I've done nothing but add version U on top, and it still works