This is absolutely consistent on my system:
1. Open acme.bug (attached) or any file with three or more CRLF terminated
    lines
2. Button 2 on 'Edit ,x/
/d' (that's ,x/<CR>/d if your mailer messes it up)
3. A +Errors window opens with this message: elogapply: can't happen 4 4 3

I updated from sources this morning.  I'm not sure how long this
behavior has been there, I just noticed it yesterday looking at some
DOS text files.  I should probably have hunted down the problem, but I
figured it would be so obvious to somebody here that I would just be
wasting time.

Thanks,

Micah