Well Automattic and WordPress have decided to pull CataBlog from the repository due to XSS vulnerabilities. That means all the download links are not working and well, basically Automattic pulled the rug from under me, thanks guys. A heads up, would have been nice.
Until I am able to fix these vulnerabilities CataBlog will not be available at the WordPress Plugin Repository. Sorry. I think they could have handled this in a better way, but it is not my decision. Expect me to fix this issue within a week or so, as I am way too busy to start fixing this right away.