I wish I had a dollar for every bug I've run across in the last three versions of Act! (I would be able to take a nice vacation.) There is an error that I reported long ago (during beta testing), but (curiously) never got an answer back. So, if you are having the same problem, I would be curious to know.
I am using v 11 with Outlook 2003. When I set the scheduler to integrate with Outlook--import from Outlook all calendar items for the next 7 days--the scheduler imports every Outlook item. The date setting controls don't work. This is quite annoying because it puts hundreds or thousands of items in the past in Act! and marks them as incomplete. If you manually import the items, it seems to work. It is just the Scheduler. Once again, the Sage programmers have not quite finished their work (although, I'm sure that if you are willing to buy the next version they will considering including a repair!)