Server is ZCM 10.3.3 on SLES
Workstations run XP 32bit and 7 64bit with ZCM 10.3.1 and 10.3.3

Lately I have had a number of PCs that seem to get policies applied
much more often than usual when people login. They get the message
that policies were updated and the PC will need to reboot. Sometimes
it will happen multiple times in a row. My PC and one other received
the message three times in a row. As soon as the PC was logged in,
the message popped up and the PC needed to reboot. Any ideas as to
what might be going on? Or if no ideas, where should I look to
troubleshoot this?