Actually, this happens to me on nearly every server. Mostly when I'm ceilingwalking as a dretch, suddenly I get flipped over and everything starts shaking, even though i can still move forward, it looks like I'm connected to the ceiling via my back. :<
Same thing happens when I'm dretching on a wall. If I stop moving for a second, occasionally I get put upright (90 degree turn) and I'm flat. This happens on *every* server I go to. The only thing that really seems to fix/cause it is \snaps. A snaps below 20 seems to entirely prevent it, and a snaps above 38 seems to cause me. Not sure why this is at all, doesn't seem very logical, but alright ^^;