Need Yahoo Pipes wizard for quick Regex alteration job

I had a Yahoo Pipes setup which takes an RSS feed and alters the output of the links in the description of the feed using Regex. It was basic find and replace stuff for parts of the link etc. However, it has recently stopped working and I can't figure out why. I need someone to take a look at it and fix it. I've cloned a public version of the pipe so you can access it and edit it according to my instructions.