What kind of scheduled tasks are set up? The scheduled tasks should still attempt to run at the same time they were set for originally as long as the time changes take effect on your systems.
I've set up a scan job on the Shavlik server. I've attached the jobs, and as you can see the scan time changes one hour. The summer time take effect on the 30th of March 2am. The 2am job is then scheduled for 3am.
I've tried to reschedule, without any luck.
First collum is jobname, second is next scan time and third is last scan time.