No, all your saves will stay.
If Minecraft hasn't updated for you, you may have to force an update. When Minecraft opens, check the force update option and then log in. That should make Minecraft update for you.
yes open minecraft click force update then play minecraft.
When an update is released Minecraft will ask you if you want to update as it starts.You can update Minecraft manually by downloading the version, weekly update or pr-release you want as minecraft.jar, and replacing the minecraft.jar in the bin folder of the Minecraft directory
try deleting your WHOLE minecraft folder keep in mind to back up all your world saves (i am not responsible if you lose them i warned ya =P) after deleting go back onto the launcher or the browser and try then should work always has for me :S
You can't "downdate" minecraft. You can only update it. But you don't have to update it.
Open Minecraft and click on the "Option" button and select "Force Update" and it will reinstall the files and start over. It won't touch the saves or world files only the core Minecraft files.
Minecraft originally came out with spawn eggs in a pre-release - 11w49a. The update was for Minecraft 1.1, in case you are looking for an actual Minecraft update release.
Minecraft is an online game and cannot be cracked. You update Minecraft on your iPod or iPhone by visiting the iTunes stores and clicking the update button.
February 22 2012. If this is for the new Minecraft update
Minecraft does not need to update for it to be compatible with Windows 8
the next minecraft update is 1.5 the redstone update wich cames out march13 2013
the next minecraft update is 1.5 the redstone update wich cames out march13 2013