Java Edition 1.0.1

1.0.1 was a server update for Minecraft released on November 24, 2011, to fix some of the bugs and crashes in 1.0.0 servers. As a server-only update, 1.0.0 remained the current client version.

Fixes
2 bugs fixed
 * "Invalid server key" error fixed when attempting to log into servers.
 * "Null pointer exception" error fixed when logging into servers.