I have the same problem.
I have a IMac
Mac OS 10,5,8
Processor 2,4GHz Intel Core 2 Duo
Memory 3GB 800MHz DDR2 SDRAM
In the Activity Monitor the Syncserver process grow in size with time, it stop growing when there is no more space... At that point the computer is useless,
you hear the hard disk working like crazy. I'm not using MobileMe or IClaud at all. I can not open iSync I got is error
I tried solution mentioned in this site but no lock!
Can sombody help us.
I was having the same problem when I noticed that the Sync icon in my toolbar showed a warning.
There were two measly conflicts for my calendar (Father's Day & Memorial Day). When I simply clicked through to resolve them, suddenly SyncServer went from perpetually using 40% of my CPU to dropping totally off of Activity Monitor.
Two stupid calendar conflicts had caused it to burn CPU & battery life for weeks.
If that doesn't help here is Apple's info file on how to reset the SyncServices folder: