I see several references throughout this newsgroup to occurences of
the value 'nan' being placed in the drift file, but most of them seem
to lead to a resolution.  Is there any reason that I should still be
seeing this problem using version 4.1.1a?  The only log files that I
see say "ntp exiting on signal 15" (/var/log/messages).  The system is
running BSD/OS.

Greg Nance