Happening with T610

I added a couple of people to my phonebook with voice labels. I tried to
use voice dialling but the phone locked up completely - needed remove
the battery then rebooting took nearly a minute. Reset all settings -
the same. When I tried to sync with Outlook, the 2 new entries didn't
appear. Reopened outlook & one of the 2 new entries was displayed
incorrectly. Edited it in Outlook, sync'd again having deleted the
corrupted phonebook item & voice dialling is working again! Go figure.