Wow, you have DONE IT, again! 🙂 Many Thanks!!!
I had to go all the way to the Terminal procedure as described in "Resetting the Sync Services Folder":
http://support.apple.com/kb/TS1627
(Resetting the Sync Services was necessary since one of the symptoms of a corrupted Sync Services is that I was able set up another account on her computer and properly sync with MobileMe, but not from her account). Only Resetting Sync History in iSync was not enough!!!
When again setting up Sync in MobileMe I realized that my wife's Macbook was listed as syncing through this MobileMe account, BUT a button also allowed Register THIS Computer with the same computer/account name. That's what I did and was informed that there was another computer with the same name, and if I were sure that there was only THIS computer with this name I could register with that name. That's what I did, having expecteded all the time that there were some inconsistencies in the sync data/settings of MobileMe on my iDisk.
Then I started to sync one after the other the Contacts, Calendar and Bookmarks, each time choosing to overwrite the computer with data from MobileMe. And now all 3 data files that are being synced work perfectly on all 2 computers and on the iPhone and on the web (i.e. MobileMe).
That syncing actually works as well as it does is amazing (I recall the anguish between June and November 2008 until syncing problems were finally solved by Apple), but I now spent close to two days to find the solution. Your help was instrumental.
Thanks and cheers,
Veit
That did the trick!
Message was edited by: vburger