UK ISP Demon Internet (THUS, C&W) reports that an error in the implementation of the Internet Watch Foundations (IWF) child porn block list has been resolved. The issue caused access to sites stored on the popular Internet Archive Wayback Machine (IAWM) website to be hindered (original news) by incorrect URLs (website addresses) that propagated the sites database of links.

It's now known that the IWF does indeed have a block in place upon some of the content stored by the IAWM but that this was never meant to inhibit viewing of the whole site. One of Demon's technical bods, Brian, explains that the situation occurred because of a problem with how its IWF filter interacted but the IAWMs cache (fast memory) servers:


Brian continues to explain that the problem would only occur in some situations, such as when the page wasn't already stored in cache. The long and short of this appears to be that it was actually the IAWM's fault, which has now fixed the issue on its site.