bizarre.
Somehow, and I honestly have no idea how, the style file for this site (which k2 reads) was converted from LF (Unix-style) to CR (Classic Mac-style) encoding. Since I’ve never edited any of those files on a “Classic” mac (i.e., one running pre-OS X system software), I have no idea how that happened. In any case, a quick re-save in TextMate later, and everything’s pretty again.
I just wish the K2 guys would quit switching repository providers; I always forget what the SVN command for changing that is, and end up just checking everything out again from scratch and moving things around into the right places.