Yes well, I don't know if it's the USKP or not but tonight I tried to play and got hard freezes twice after about a half hour or less each time.
Considering it's an emergency update as Arthmoor says, it may have some issues. Not blaming it specifically, but it's the only change I've made since I started from the beginning with a new character and played right up to level 7 a few days ago, (over five plus hours) and had no problems at all. Haven't played since then until tonight.
In the USKP thread no-one has mentioned any problems with the actual patch yet, but there is talk about other things BGS has done that are potentially serious, like messed up script errors for the Companions quest lines (among other things) mentioned in the 1.6 Beta thread which is now locked and hidden. They were not addressed either before the patch went final. Mods saved with the latest CK also have big issues it seems because of introduced bugs. This is from people who know what they are talking about like Arthmoor who is on the USKP team.
I might try it with the USKP disabled and see what happens. Then again I may wait until things get sorted because otherwise it's just going to annoy the hell out of me. I did manage to get the horse armour working when I discovered my horse was the only one without it. Just disabled and re-enabled it in the console to reset the models.
I'll go back to Risen 2 which I've been playing in the meantime. Very hard game like the Gothic games, but very enjoyable and with a ton of replay value with different builds. I'm trying to get the money to buy a monkey...
and so I can train it to go into houses, and more importantly, some of the hard tombs and dungeons and steal stuff for me. Then I'll get a parrot which also does something useful but I don't know what yet. Every pirate needs a parrot.
I'll make a topic about it and post some screenies in the Other Games thread later for anyone who is interested.