There are some strange things going on on BG2 SoA.First,Jaheira just vanished after I have sleep ,my imp remain stock in areas like Irenicus Dungeon,so when he pass to the other screen the cut-scene happen again,people apears busy when they do nothing else...This is FUN!

Wait, hold on, not so fast, where are you now?

Did you ever patch the game with the upgrade? Download it from here if you did not. It fixes some of these things.
But Jaheira is supposed to dissapear. Did not someone give you a note the next morning? It explains it.

You need the patch for the "busy" bug that occurs with win XP.