UBB.threads PHP Forum Software Community Forums UBB.threads 7 Installation and Upgrade Support Upgrade PHP to what version?

So I just upgraded
from PHP 5.1.6
to PHP 5.4.21
and I'm been fixing buggy issues for the past 4 days.

Tonight I got word of another app that I built a while back which is now throwing "array to string conversion" errors.

So -- SHOULD I DOWNGRADE my PHP installation? Back to 5.3.x?
(I'm not sure that I can fix these new errors.)