you've probably corrupted your minecraft. at the login screen click ''options'' then click on force update. After that you should be fine.
Good Luck! :)
Re instull Minecraft
Yes you can, their worlds wont appear on your computer, all you have to do is download the minecraft application. there is no limit on how many users are on one account.
They don't.
you wont believe what it is its 12345
it might be your visa card try email visa and/or minecraft for suport.
I tried many times, i dont know, but i know that when u install it, u install it as minecraft.zip, and i think its supposed to be jar. Or maybe im not right. Anyways the full 1.3 update comes out August 1, 2012. And i think that has to work.
tell mojang about the problem or wait
it wont you need to download the server thing of the minecraft website and replace the old one with it.
only minecraft classic multiplayer is free, beta mp is for premium only a.k.a buy the game.
unfortunately there wont be a wii on the minecraft, 4j studios (the proudcers of minecraft xbox) made it on the xbox. They will only make it on there because there tempting you to get an xbox with live. But they will make it on the 720.
either you don't have An internet connection or you have a cracked account on minecraft and it wont let you on. The alternative to this is their minecraft server was having issues.
Because 1.6 hasn't come out yet.