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.
Would it be possible, at some point, to make the Xkit setting accessible (in Firefox, specifically) via a toolbar button or the addons dialog, or even a bookmark, so that if Tumblr changes something and makes the Xkit button disappear, we can still access our settings? Thank you!
The idea of doing that is already being thrown around. Nevertheless, thanks for your suggestion!