When I am walking through a small hallway or a door in a multiplayer server with a bit of lag, it will sometimes snap me back a few blocks because the server thought I walked into a wall or the side of a door, but the client showed me to continue walking. I will usually ignore it and keep walking until I notice that I can't interact with blocks like doors or chests. When I log out and back in, it will put me back where I hit the wall or door. This has happened less in 1.4.4, but it was not fixed.
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Ok, search showed nothing, thanks for that. Should I remove it?
Oh wait, I can't remove it. I wish the authors would be able to delete their own posts in a case like this. Sorry!
Duplicate of MC-811