Log message "ezmlm-clean:_fatal:_unable_to_open:.../mod/unconfirmed"?

I just noticed this message occurring in my email logs connected to
ezmlm lists I run:
2007-09-15 15:57:37.298028500 delivery 27439: success:
ezmlm-store:_info:_qp_12490/ezmlm-clean:_fatal:_unable_to_open_/home/ezm
lmlis
t/nigeriahealth/cross-cutting/mod/unconfirmed/:_file_does_not_exist/did_
0+0+4/
...
2007-09-15 15:57:37.379782500 delivery 27440: success:
ezmlm-store:_info:_qp_12500/ezmlm-clean:_fatal:_unable_to_open_/home/ezm
lmlis
t/nigeriahealth/hiv/mod/unconfirmed/:_file_does_not_exist/did_0+0+4/

I'm concerned about the part after "fatal...". I just noticed these
messages now, but searching my logs show them showing up in all the logs
I have, back to 13 Sept. I also notice that they seem to show up in
relation to many of the ezmlm lists I run on this server, not just to
the one user cited above.

Any ideas what's causing this? I manually created the ~/mod/unconfirmed
directories for the list of this particular user. Will this fix it?
Should I go ahead and do this for all the other lists too?

Thanks for your help and advice.

-Kevin

Kevin Zembower
Internet Services Group manager
Center for Communication Programs
Bloomberg School of Public Health
Johns Hopkins University
111 Market Place, Suite 310
Baltimore, Maryland  21202
410-659-6139