Status: Unverified Fix
Component/s: Knowledge base
The mysql_upgrader.php script listed for 3.0.2 on that page under the "Fit It" section appears to actually be for 3.0.3RC1 and thus doesn't work for 3.0.2 installs and throws an error about the group_max_recipients column.
Link to the script (listed as "For 3.0.2 mysql_upgrader.php"):
Code from SVN that leads me to that conclusion: