Received a private message from user luckkyman:
Hello, friend. Highly recommend you to check your computer for viruses: http://www.check-pc.net/detected/AJRussell
AJRussell is my user name for the hosting and I think on the forum too (first post)
Pretty nasty site it takes you to, it loads up a My Computer window and scans your C: and D: drives for viruses/trojans, which it finds loads of. It then pulls up a Windows Security Centre notice asking if you want to remove them, and if you click Yes it downloads an .exe file. I might have fallen for it if I wasn't on a Mac
Anyway, just thought the forum staff should be made aware.