For an unknown period of time, the links for editing blogs (and creating new ones) didn't work.  This problem has been resolved, and I am working on finding the cause.

This problem appears to revolve around a problem with parsing template vars in the CS-Content system, though I've not been able to find the problem.  I believe it has something to do with parsing template vars inside of parsed template rows... but that's just a guess (not as though that explanation means much to anybody but me...).