Here is the current index.html and the old index.html from the forums. For completeness' sake, I've also included the index of the template file the forum was using.
On a side note, I received an e-mail back from Avast - they said they were seeing many reports from a url "downloadnow.9thlevel.ca" and blocked my entire domain. Downloadnow is not a valid subdomain of mine nor is my webserver configured to host it, so I'm guessing that the issue was a dns injection / wildcard issue which caused the report in the first place. Unfortunately it is not an issue I have any control over nor do I apparently have any ability to fix it. Anyway, their response was that they have modified the block to be the subdomain only, so hopefully when I get my next update that will solve things.
Update - I host my DNS with a service called "FreeDNS.afraid.org" - one of their options is to allow other people to use your domains for their own subdomains and point them elsewhere. I am SUPPOSED to be notified when this happens and be able to approve/deny domains. I had no such notification and as I cannot resolve this "downloadnow" name I'm not sure if this is the issue, but it is possible their was a fault in their system which has caused this confusion. Not guaranteed that this is it, but at this point it seems to make the most sense.