[CentOS] PAM Errors in proftpd

Logwatch on my NU-BQ+CentOS box has been giving me these errors for 
the last week or so. Any ideas on what is causing this?

  --------------------- proftpd-messages Begin ------------------------

**Unmatched Entries**
secure2.pdcweb.net (localhost[127.0.0.1]) - PAM(setcred): System error
secure2.pdcweb.net (localhost[127.0.0.1]) - PAM(close_session): System error
secure2.pdcweb.net (localhost[127.0.0.1]) - PAM(setcred): System error
secure2.pdcweb.net (localhost[127.0.0.1]) - PAM(close_session): System error
secure2.pdcweb.net (localhost[127.0.0.1]) - PAM(setcred): System error
secure2.pdcweb.net (localhost[127.0.0.1]) - PAM(close_session): System error
secure2.pdcweb.net (localhost[127.0.0.1]) - PAM(setcred): System error
... many more.

Thanks!
- Bill


---------------------------------
William J.A. Brillinger
Precision Design Co.

E-Mail:   mailto:billy at pdcweb.net
Web site: http://www.pdcweb.net
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