Y - looks like your problem has nothing to do with the .mac maintenance. Try the following from Terminal:
Get error code from dotmacsync.log (found in Spotlight). Google: .mac sync error 6003 From Apple’s boards re: 6003, some Terminal mojo:
$ defaults read -g iToolsMember If the .Mac account shown is not the one you’re currently using, then try the following to “start over” with .Mac sync, but first make sure you quit System Prefs: Didn’t work; neither did resetting the sync history….
