Thanks for the suggestions.

After trying that, and still having difficulty, I hit upon the answer which
is in a similar vein to your idea.

Turns our that in my Outlook Contact (the original one) I had created a new
form for the contacts.  In doing so, a new message-class was assigned to the
contact entries as I updated the them.  The default message class is
IPM.CONTACT  --but-- any new contacts that are created, take on the message
class of IPM.<formname> which in this case was IPM.CustomContact.

So when you update your contact information, or sync it from a PDA, and then
later drag-&-Drop it into the "PhoneBook" folder for syncing with the phone,
it will have an IPM.CustomContact message class and therefore not sync as
expected.

Somewhere in the logic of TrueSync must be code that only syncs the default
message-class IPM.CONTACT, so by writting some quick and dirty code to
change the internal message-class from IPA.CustomContact, back to the
default, the syncronization now works as before.

Bottom line is that if you create a new form, you need to save the original
with a new message-class just in case you need to return to the default.
Then take the new form, ans save it with a default message class of
IPM.CONTACT.

Viola, problem solved.

<PS> A search of Google turned up a canned utility for this purpose called
DocMessageClass from www.outlookstore.com