Over the last week I have been redirected to "suspicious" sites while browsing the forums. As a consequence, I have performed security maintenance on both the forums and my own PCs. This investigation has found no malware, and a search of the internet suggests that numerous other sites have experienced this behaviour. I have narrowed this down to potentially the ads that run on the forums. As a result, I will be removing all adverts over the next few days and monitoring the results.
PLease let me know of any suspicious activity you see on the site.