While making a redstone door, at one point while designing it I ran into a problem. As soon as I flick the lever to OPEN the door, my game crashes. But when I rejoin the server (server survives, client doesn't seem to like it so much though) The door is indeed open, and when I flick the lever again to close it, it works and I do not crash. Only when I open it it crashes. The door does have many observer blocks, so maybe it is those the client does not like. I can not really take a screen shot of this in action, but here is the crash report I get.
http://prntscr.com/crxtm0
"Ticking block entity"?