This worked correctly in my previous version of office (2003)

I'm creating mail merge documents using an Excel doc as the data source. In Word, when I specify the following criteria for fields and conditions:

Mailed is blank
and Print equal to X

then click on OK to close the dialog, Word creates the following:

Mailed is blank
or Mailed is blank
and Print equal to X

This invalidates the conditions I originally specified, as there are many entries where the Mailed field is blank and I testing for the originally specified set of conditions only.

This bug is reproduceable - should I go to Microsoft with it in some way?

Thanks in advance,
Bob Charest