Bug #1:
I've been playing mp with my brother. I'm controlling the fighter from the inn (forget her name). We love the bull rush skill

but, it seems very buggy (at least in MP). What often happens is that I'll set up a long rush to hit 3 or 4 enemies. On my screen, the enemies will all take their damage and/or get knocked down, but, she will end the rush early, as if she got 'stuck' on one of the enemies (even though the ones further in the line still take damage). On my brother screen, it will look correct - she's be standing in the spot that I targeted for the end of the rush.
This happened twice - the first time, I moved her to attack another enemy. In this case, my brother saw her instantly snap from the position she was supposed to be in to the position on my screen, then start the move I planned for her. The second time, I didn't move and instead attacked the enemy that I got stopped on. This time after the attack, on my screen she snapped to the original spot I had targeted for her rush. On my brothers screen, she was already at the intended end of the rush, so he saw her swing, then some enemy 5 feet away take the damage (the enemy that I was stopped beside on my screen).
Bug #2:
We reproduced this bug quite easily. While I was chatting with an NPC, my brother attempted to start a dialog with on of our companions (both of them were standing near my character). Nothing happened, and afterwards, my brother's character could not start dialog with any NPC, and I could not start a dialog with the companion. This was permanent and did not reset after loading - we had to load an old game.