When I reply to people, Google adds them to “other contacts” in Gmail.
Unfortunately, people in this “group” sync to e.g. MobileMe.
Is there any way to prevent this?
When signed into GMail you can go to settings ->
Create contacts for auto-complete:
When I send a message to a new person, add them to Other Contacts so that I can auto-complete to them next time
I'll add contacts myself (select this option to keep from adding people automatically at all)