I have the same thing

But I find I sometimes forget to update it, when I add someone's number to my phone and I'm not near the computer to edit the document.

When that's happened, they tend to stay off the document forever, even if they are people I'm calling a lot - after all if I knew they weren't on the document, I'd have put them on already.

It's a long job to go through phone contacts comparing them against the list in the document.

Of course with N900 it's possible to edit the document right there when a contact is added :-) But I know that I'll forget sometimes, being in a rush or whatever.

This is why they invented things like SyncML. But there's that uneasy feeling that it might delete or corrupt something silently - unless a syncing app has really proven itself to be rock solid.

I've used Nokia PC Suite with other Nokia phones, and that does mangle contacts on a regular basis - because the fields it shows in the contacts view are very limited, and not at all as complete as the fields in the phone's contacts database.