Alright, I added a bunch of tags to this thread. From the New Content page, if I hover my mouse over the "and X more..." part of the tags of the post, I get this:

[attachment=8315:Screen shot 2012-04-18 at 6.31.07 PM.png]

Text version:

Warning[color=#5A5A5A][font=helvetica, arial, verdana, tahoma, sans-serif]

: App or area missing from classes_like in[/font]
/var/www/gamedev/admin/sources/classes/tags/bootstrap.php[color=#5A5A5A][font=helvetica, arial, verdana, tahoma, sans-serif]

on line [/font]62

Fatal error[color=#5A5A5A][font=helvetica, arial, verdana, tahoma, sans-serif]

: Meta ID missing in[/font]
/var/www/gamedev/admin/sources/classes/tags/abstract.php[color=#5A5A5A][font=helvetica, arial, verdana, tahoma, sans-serif]

on line [/font]918

I got the same error.