Thanks very much, t and TT!
Another question, linked to your answer, tooki (which I will repost, if you want, since it deserves a different subject heading):
When I use iSync (both the old version 2.1, using a T610 plugin, and the new v 2.2 which came with the OS X 10.4.6 update, requiring no plugin), it mysteriously duplicates and adds a " - " to the end of many of the names on my phone. The problem was worse with v.2.1 but still persists after the update.
I did a "merge" on first using v.2.2, having set up a "T610" group in Address Book, and followed Apple's new iSync instructions to the letter. I then had to manually delete the affected entries on my phone, which was a pain.
The sync also creates duplicate entries in the "All" group in AB. And, strangely, these duplicates have no "-" added.
Any suggestions on how to avoid these problems?
BTW, I have also tried OnSync and there the results are even more unpredictable.