We've decided to update XKit. It's harder than it looks. We're not in contact with the original XKit Guy, nor do we have access to xkit.info. We currently operate at this blog and on GitHub.
I noticed you updated the audio downloader extension lately. Any chance you could say what you've fixed since it's been kind of buggy for me for awhile?
Mostly code-style changes, nothing that changes the behavior of the extension. What bugs are you experiencing?