Okay, so apparently it was a user error. Here is what I got back from the exceptionally helpful admin over at PageLines (after a few emails back and forth):
Hi Josh. Thanks for your reply.
I originally worked with the client so I was able to look up his ticket. Here is what he stated on 4/16/12:
"I currently use PageLines Framework 2.1.3. When I installed the 2.1.5 update I could no longer view other admin items. The only thing I could see is my dashboard. Everything else showed a blank page. I couldn't remove the theme update since I couldn't get to the theme admin page so I restored 2.1.3 from back up. Today I tried to install 2.1.6 with the same results. I currently run WordPress version 3.3.1."
After advising him to disable his plugins one by one to see if a plugin was at fault, he replied with "Ulitmate TinyMCE plugin was causing the problem."
Normally, when someone does this, we trust that they know what they're doing since disabling plugins is a pretty standard fix. However, i visited my test site and installed the Ultimate Tinymce plugin and did not have any issues at all. Keep in mind that I am not able to replicate his issue exactly as 1) I'm running WordPress 3.3.2 and 2) I don't have an earlier version of PageLines to upgrade from.
I have removed Ultimate Tinymce from our list of reported incompatible plugins (both in the forum and in the Wiki) since I was unable to replicate the issue.
We appreciate you taking the time to reply to help us get this resolved and we apologize for any inconvenience this situation may have caused.
So, I would guess there is not any incompatibility issues with my plugin.
Again, thank you VERY much for bringing this to my attention. If you would like one of my paid addons (as a thank you), just let me know.