Syncing iCal using .Mac causing duplicate events

I just got a new PowerBook laptop with Leopard. I also have an iMac running Tiger.
I synced the new PowerBook and iCal looked great. Then I added a couple of events on the PowerBook and synced again with .Mac.
The next time I synced my iMac, I had literally hundreds of duplicate events.
I went through and deleted all the duplicates and synced the iMac to make sure .Mac would be clean without duplicates.
The next time I used the PowerBook and synced it, I ended up with duplicates on the iMac again.
I was keeping my iCal synced with my old laptop running Tiger and never had this problem.
Does anyone have a fix? Help!!!

I stumbled on this discussion and am chiming in because I've just upgraded to Leopard on my home laptop, and this a.m., after trying to sync iCal on my work computer (running 10.4.11) with my .Mac account and my home computer, iCal has crashed repeatedly when the "Resolve Conflicts" window comes up.
Interestingly, all of the "conflicts" actually appear to be identical duplicates, although I can't be sure because it's crashed before I can get beyond the 3rd or 4th "conflict" every time.
This is the first time I've tried to sync the calendars between the two computers since I installed Leopard over the holidays. Because I work for a big university, it'll be a while until they update the system on my work machine...
Anyone else experiencing these duplication-related crashes? I'm wondering if I'm going to have to wipe one of my calendars clean.

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Hi all
I'm running iCal 2.0.3 on an iBook with 10.4.3. Every time I try to sync iCal via .Mac, I get the following error:
The protocol „/tmp/gs/isync/3rFduE“ could not be copied or moved to „/Users/gs/Library/Application Support/SyncServices/Local/Compat/DotMacPAPIClient/com.apple.DotMacLegacy/Input /37CFD216-92B7-11D8-9634-003065B36BBE.D000.CLOG“.
(Note: The error message was translated from german).
I trashed the iCal prefs, caches, the folder ~/Library/ApplicationSupport/SyncService and ~/Library/iCal to no avail. Sync works perfect on any other of my Macs, it's just this iBook.
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MacBook Pro (Mid/Late 2007 or newer)
Xserve (Early 2009)
MacBook Air (Late 2008 or newer)
Mac mini (Early 2009 or newer)
Mac Pro (Early 2008 or newer)
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Message was edited by: Jason L

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Syncing iCal using .Mac causing duplicate events

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