From Minecraft Wiki
November 24, 2011
|Other editions of 1.0.1|
1.0.1 was released to fix some of the bugs and crashes in 1.0.0 servers. As it is a server-only update, 1.0.0 remained the current client version.
2 bugs fixed
- "Invalid server key" error fixed when attempting to log into servers.
- "Null pointer exception" error fixed when logging into servers.