Everytime I try to play on my favorite server, my minecraft repetitively crashes and I have to log all back in.

I don't know how you trigger the bug, I don't know why its happening and it seems to happen every 30 mins or so. I would really like to know how to fix this, its becoming very annoying.

When I play some people on the server say its because of the 1.7.2 objects, I don't know if that's true.