Looks really great but:
I noticed a few pictures seem to be the wrong way up on my iPhone 5. (Forum Deluxe - Topic Candy Aquamatic! & other changes for instance).
I also think the links to each topic should be a bit bigger on the phone, maybe remove the advert down the left side, and instead let the forum topics be shown in the full page.
Also my iPhone 5 let me switch back to the desktop version, though when I went back into a different post it automatically reverted me back to mobile version again. Maybe an option that if we view it in Desktop, it stays in desktop?
BTW: Have you tried Serif software?
I use the software for a website that I create for a local swimming Club, serif has mobile templates capability. Its a bit easier than using Codes!