It's a bit hard to explain. I'm playing a monk. Whenever I'm comboing and I dodge an attack (which happens often, you know), my monk "resets" his actual animations and follows with the next attack - but on real environment, attacks animations happen different from what my monk is doing, forcing me to stop to actually see what combo stage I'm in. If I try to move while this bug is happening, my monk starts to stutter and consistently "teleport" to original location, like the server "thinks" I'm still attacking. It's a little hard to explain.
To reproduce this, simply play a monk and combo (expecially with different skills), waiting to dodge an attack. When this happens, most of the times the bug will also.
This is causing a lot of problems in Inferno, you know.
(Sorry for the possible cheap english)
EDIT: I would like to add: it's not only a problem of combos, it happens with every other skill I use after dodging. It simply is more noticeable with combos.