I haven't had a single hitch up until now, but after upgrading (apparently successfully), I'm no longer able to access admin.php.
The Board itself works great, without a hitch, and I can even navigate around the admin area from a window which I'd left open prior to the upgrade. It's just the admin.php which I'm unable to reach.
Here's the error message:
Fatal error: Out of memory (allocated 14155776) (tried to allocate 24692 bytes) in /homepages/blahblahblah/htdocs/xenforo/library/Zend/Db/Statement/Mysqli.php on line 276
I'd really appreciate anyone's time. Thank you.