Thanks for all the helpful ideas boys!
I ended up:
Having the phone actually crash to the point that it was flashing the Apple logo and doing nothing else. I then...
Returning the phone to factory settings and installing my last backup.
Jailbroke the phone again (gluten for punishment) and installed one tweak/app/add-on at a time while testing the previously failing apps for functionality.
Everything works perfectly!
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Actually this makes sense...I did install a custom font...
I ended up:
Having the phone actually crash to the point that it was flashing the Apple logo and doing nothing else. I then...
Returning the phone to factory settings and installing my last backup.
Jailbroke the phone again (gluten for punishment) and installed one tweak/app/add-on at a time while testing the previously failing apps for functionality.
Everything works perfectly!
----------
When one has custom fonts installed, many applications will fail because incorrect font values are loaded.
Actually this makes sense...I did install a custom font...