Activating Mime Mail Breaks My Site; Can't find function mimemail_theme_theme()

This is more of an FYI than anything, because I installed the dev version of Mime Mail and the problem went away.

But for some reason, activating Mime Mail 7.x-1.0-alpha2 caused the site I'm working on to completely break. Every page I tried returned either a WSOD or a 500 error. The only way I could get anything back was to manually disable the module in the database and refresh a few times.

On looking at my log files I found this error over and over again:

PHP Fatal error: Call to undefined function mimemail_theme_theme() in [drupal-path]/modules/mimemail/mimemail.module on line 128

When I first installed the module, I tried to activate both Mime Mail and Mime Mail Action simultaneously and was prompted to activate Trigger as well. After I confirmed this the problem began. No idea if that was related.

I tried several of the usual catchalls, but nothing worked. I ran the uninstall after deactivating the module and cleared all caches. I also deleted the module folder from the server and reuploaded just in case.

I'm running Drupal 7.19 with the Zen theme.

As mentioned before, this problem is NOT occurring with the latest dev build (currently 7.x-1.0-alpha2+10-dev). I'm still fairly new to Drupal so I have little insight into why the function was coming up missing or why the error was not reproduced with the dev version. They both have identical versions of this function under [drupal-path]/modules/mimemail/theme/mimemail.theme.inc.