My main one would have to be queue dropping. If I queue up 'perform' interactions on the guitar, then go to see what my other sim/s are doing, the perform actions will drop WITHOUT FAIL. I have to watch the guitar player like a hawk. Then just every now and then other actions drop from queues - sometimes due to fans asking for autographs, sometimes for no apparent reason. It makes micromanaging at least twice as hard, because I have to double check everything to make sure my sims are actually doing what they are told!!