after upgrading to 10.6 address book loses contacts

Tried some of the suggestions I've read here,

went into the home folder Library/applicationsupport/addressbook/ and trashed the v-22 cache file

also reset the sync by way of holding down the option key and clicking on Sync menu neither of these

brought back the missing contacts there were 470, now only 170 are available, how did they get

lost? There is no other profiles or volumns on the HD the only thing done was a upgrade to Snow Leopard

any suggestions?