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The Changes: I have a blueprint style border around sections of the site (which has prooven to be the biggest pain thanks to IE). For some reason, that border suddenly stopped working and caused the news on the front page to not display if I used it. So I reverted back to the old version.
While we wait for the company producing our games' logo to come up with it, we put the page on hold, however now the project lead wanted to fix the front page so it had that paper and paper border there again (before it showed nothing and the black text on the wood is very hard to read!)
So, I was trying to make the changes... and found I could literlaly upload a completly blank version of theme_blockcenter_c.html, and the front page would still display just fine - I had to delete the file to make it not display. Heck, I could delete it, then re-upload a blank one, and it would still display just fine.
So - I read the FAQ's, see things cache, and nuke the template_c directory... and that brings us to where we are now.