CRON runs things twice

[Charles Hedrick]

Are you using a program that does adjtime, i.e. nntp or timed?  This
is a Berkeley call to adjust the time slowly.  It changes the clock
speed.  System V cron gets confused when this is done.  We had to fix
in on the Suns.  Presumably the same fix will work.  If this is
your problem, send me mail and I'll try to find out who has the
diffs.  If you don't have source to cron, there's not much I can
do for you.