Wow, it's been a long time since I've been around here.
Back in 2004, I uploaded a handful of extras to the AdiumXtras site, including the Slick dock icon set. I haven't made any changes since I first uploaded it. When you view its detail page, all the correct data is displayed, however, if you click the download or install links, you get Bradiumy, instead.
Now, I still have my copy of the Slick extra, so I can just re-upload it, but it seems to me that if it happened to one Xtra it's quite possibly happened to others as well, so I thought I should give someone a heads up.
I'll leave things the way they are for now, so anyone who feels like investigating, can do so. I'm going out of town for a few weeks, when I get back I'll upload the correct Xtra to the server.