Hi Andy, thanks for posting.
Is your wiki subdomain "andy"? I received a sync error notification from an attempt to update that account's WikiPackUserGuide page. It was trying to download it from Dropbox, but the page already existed in your wiki. Somehow, it seems that there are duplicates of every page in your wiki besides the HomePage.
I see that the HomePage has content, but all the other pages are empty. If you like, I could delete the empty pages for you, and then Dropbox sync should work as usual.