I have just recently updated MC played on it for a bit to see the new features then went to updated my mods for the game I returned to just Vanella minecraft after that and I opens it up and it just has the loading bar up and says updating minecraft and below that is says done loading with the bar almost to the end and it just stays like that I was wonder if anyone has ideas to fix this

If you have mcpatcher there should be a 1.4.7 file just copy it into your 1.5 file after deleting the 1.5 file guts lol and then ther you go

Dumb question but what is an MCpatcher ?