Have you recently updated to Minecraft 1.1? Trying to get back into the server but getting error messages? That's no problem! This entire post will be the key to fixing it. All you need to do is use this down-grader - http://www.minecraftforum.net/topic/818507-tool-minecraft-downgrader-easiest-way-to-downgrade-your-minecraft/.
Tutorial to Downgrading -
Mac users, please consult this thread - http://www.minecraftforum.net/topic/284331-tool-mc-downgrader-the-time-machine-for-minecraft/
Look for the Mac OS download, and the video also should let you know how to do it.
Tutorial to Downgrading -
Mac users, please consult this thread - http://www.minecraftforum.net/topic/284331-tool-mc-downgrader-the-time-machine-for-minecraft/
Look for the Mac OS download, and the video also should let you know how to do it.