Edit: Also I tried joining and I was fine until I started to move around, even tho chunks were loading when I was standing still.
Anyhelp?
And I got same Issue and this is the error I got (This is it in the log!)
2013-05-27 21:11:52 [iNFO] [Minecraft-Client] Stopping!
2013-05-27 21:11:52 [iNFO] [sTDOUT]
2013-05-27 21:11:52 [iNFO] [sTDOUT] SoundSystem shutting down...
2013-05-27 21:11:52 [iNFO] [sTDOUT] Author: Paul Lamb, www.paulscode.com
2013-05-27 21:11:52 [iNFO] [sTDOUT]