RC4 > RC5 results in blank white pages

[phatmass]

I just successfully completed an upgrade from RC4 > RC5 without any errors. It says it was a success. Problem: Now every page in my forum is a blank white page. Nothing.

http://www.phatmass.com/phorum/

I re-uploaded all files and tried again. Still blank.

 

[SJ77]

Do you see errors in the error log?