The Unofficial Patch 1.06 includes all fixes available, at leat I hope it does
The game CTD's if you play more than a couple of hours at once, I usually exit the game once every hour and then load from where I was. If it kicks you out before that you should check the log file created every time the game chrashes, you can find that in the Gamedir\log folder. Look out for the [ERROR] and [WARNING] entries in the log, those are the important ones when troubleshooting.