When entering/exiting nether portals I get this error most often, but sometimes while traveling and sometimes while sitting still. This has been happening since the snapshots for 1.7. There was an issue open but it was marked as resolved. Many people have been posting on the closed bug but nothing has changed.

PLEASE HELP. I cannot play the game as it is, I get booted too frequently. Sometimes it seems to break the server, and it will say I'm on in the Server screen with the new mouseover feature. If this happens, only a server restart will let me reconnect.