If you've tried to import a Drupal database dump with the cache table data still intact, you've probably at one point or another run into a "max_allowed_packet" error coming from MySQL. An easy way to address this is to increase the setting in my.cnf.
things that suck
If you sent me a personal e-mail in the past week, I no longer have it. >:\ Apparently either DreamHost or Thunderbird choked to death on the 20,262 e-mails I had waiting for me after I came back from vacation and thought it'd be an awesome idea to just give up and delete them all. THANKS. Thankfully, @lullabot.com goes somewhere else, so those are ok.
On a related note, anyone know of any decent e-mail providers? :P