Earlier I reported about two crashes related to MySQL 5.0.22 on
Ubuntu 6.06 LTS.
I think those bugs show a lack of testing on the side of Cannonical/Ubuntu. And for MySQL there is a quite good test suite available, so it's not rocketsience.
There are multiple reasons why you could use the MySQL Test Framework:
1. Test if bug you previously experienced exists in the version you are using or planning to use.
2. Test if configuration changes have a good or bad result on the stability of mysqld.
3. Test if important functions still return the correct results …