When I try to start the game in any of the new snapshots, the game will not load. It just sits on the loading screen indefinitely. I have waited up to 90 minutes to see if it will load, and it doesn't. The game also cannot be closed by clicking X in the corner; it has to be killed from the terminal.
When I try to play the game in 1.6.4, it works just fine. Only the snapshots have a problem.
Duplicate of MC-31714 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.