I updated mysql and not it won't start. I tried removing it and reinstalling and it still will not start. I get the following error in the logs. When you start it it just tells you that mysql timed out. I get more information by looking at the error log:
Error message file '/usr/share/mysql/english/errmsg.sys' had only 480 error messages, but it should contain at least 481 error messages. Check that the above file is the right version for this program!