Errors pinging servers

If you were trying to add a server (or view your server list) and were linked to this page, there it is likely that the server gave the game bad (corrupt) data to your game (client).

Fortunately, it is relatively simple to resolve this issue, although you

If you were trying to add a server to your multiplayer list, and got this error, then the server may have returned unexpected data to the client which caused it to crash.

To fix this, you may need to reset your server list to default.

Resetting your server list to default

If you are getting this error after adding a server to the game, then the game may not recognize the server, and cause it to crash.

To fix this, you may need to reset your settings to default, by following these instructions:

Locate the Minecraft data folder
Look for the file "servers.dat"
Delete the file, which usually can be done by selecting the file and pressing 'Delete' on your keyboard.