Very strange Radio error

I was trying to post an entry about a Javascript error on the RFB home page when instead of Radio successfully posting the entry and returning the usual desktop weblog homepage, the ordinary text box was replaced with this error message:

[Macro error: Can’t evaluate the expression because the name “” hasn’t been defined.]

If this entry posts successfully, then the problem has something to do with the text of the entry I was trying to post.
If I get the error again, then you won’t see this (at least not right away), and I’ll have to figure out what the heck is going on.