Another question for those of you with this bug (because I'm brainstorming on this ;P ): Were there actually Sims working at the counters of the resorts when you clicked "Check In"? I ask because I've seen a few threads where people said that nobody was working the counters at their resorts. Perhaps, and this is just more speculation, but if one was to click on the resort to check in when there was no NPC there to actually check them in, it could cause the freeze?
I haven't experienced this bug in my own game. I also use the Register mod, which may be helping, but I am not sure if that's the solution or not.
