For the love of God! I figured it out.
Dammit!!! The problem was just with the one style file. What caused it you ask? Well, let's just say that color attributes need to have the pound sign (#) in front of the hexadecimal color code. Somehow I lost them in the forum display settings.
What screwed me is that even with the missing # changes still showed up in the preview panel
but not on the live forum. My only hope here is that someone else can learn from my post (and mistake) as this was apparently really easy to mess up.
Sometimes you just need to shut down your PC and walk away for a while.