Odd that it doesn't work in FF 9.0. There aren't any ads. Shouldn't be any JS errors either.

The technology behind the scenes is pretty simple. PHP + MySQL + Redis. Front-end is MooTools and I use Sass to generate my CSS. I have some cron's running to migrate newly added content to AWS/CloudFront. Certain data is cached via Redis and soon, almost all of it will be in the cache.