I'm having problems with iSync in Tiger (4.1). I have both Nokia 3600 and Sony Ericson T637. After setting up each of them, certain contact categories such as the home telephone number, zip code, and city name is left out. I have tried resetting the devices and resetting them to their original manufacturer state. However, I still cant figure out the problems. The Nokia 3600 syncs information on all contacts, however randomly leaves out information on certain contacts. It appears that the information it mis-syncs is chosen at random. Example: Upon first sync, information in Contact A is complete, however Contact B may be missing a zip code. Upon second sync, the zip code from Contact A disappears, and Contact B has all of its information including the previous missing zip code. The T637 refuses to sync anything other than the "primary telephone number" and "other info" contact categories. It also refuses to add new contacts to its phonebook that were not originally entered manually. Hasn't iSync been around since 10.2 Jaguar? You would think that Apple would be able to get their act together and create a working sync system! Apple recently moved .Mac and iPod sync (two of iSyncs three main functions) to different locations in Tiger. Makes you wonder if Apple getting ready to abandon the iSync application, and shoot for a fully integrated sync system with future Tiger updates. Anyone use iSync on a daily/regular basis?