FuseTalk is just an application built on coldfustion templates, nothing is compiled or encrypted which clearly indicates that the error above has something to do with either encrypted or binary content other than the actual forums. This would be the mod_gzip control which compresses templates into a sort of binary format.
Now, that issue is a result of the mod_gzip control being used to compress the pages, it is a known issue that once and awile the compression format goes a bit wierd with certain browsers/proxies. There is nothing we can do about it unfortunately until the gzip control is updated.