When entering Camp Mc.Carran with Arcade as a follower for the first time (first time for Arcade, that is), he stays outside as you enter and does not follow. I made it all the way to the McCarran terminal building before I realized he was missing. When I returned to pick him up, he gave me the "You've got to hand it to the NCR" speech; after that he would enter the camp with me. The speech does NOT trigger until I go through the McCarran gate, and Arcade does NOT enter until I go through the gate and then come back for him to give me the speech. Not a major issue, but it'd be nice to have it fixed.

Y'know, Arcade did that with me recently as well. I didn't think much of it at the time.

There's also a spot/door in Freeside where no companion will go through/follow me through anymore. It's the door that's near one of the druggies that the Follower leader wants you to find...it leads outside to where you later deal with the King's NCR problem. Before the patch companions would follow me through there, now they refuse to. I have to go the long way around to get to that area now. :/