Problems with Majordom

Gentlemen,

suddenly my FreeBSD system after a few years in production have gotten a =
problem with Majordomo.
I have not upgraded sendmail (my mailer of choice) or anything, but =
suddenly the Majordomo mailinglists fails with:
"Cannot mail directly to :include:s"

If mailing to an alias with include without going via Majordomo, it =
works.

Anyone seen this issue and found a solution? I followed all the =
instructions on the sendmail.org homepage but coudlnbt solve the =
problem.

cheers
Patrik