Great hack this, but I have spotted a slight problem with the "Archive" version of threads.
Even with the replace "{br} with <br />" carried out as explained in the instructions during the installation. The Archive version of threads still doesn't work right like this quote shows taken from one of the RSS Feeds in the archive section. I even tried changing to BBC News Feeds and got the same issue with "{br}" being inserted into the Archives and not working right.
Here is a RSS Thread taken from my archives to show what I mean