Jim, thanks for the reply.
The form is published to a MOSS 2007 site as a 2007 IP client form. All of my company's web sites open into the Local Intranet zone due to the wildcard added to the Local Intranet zone Sites in the IE browser. Operationally, it all seems proper its just that in InfoPath forms opened in the IP client the links invoke no action to open the web browser when they're clicked. The same forms opened via IP form services operate as expected.
I have just tested with both IP 2007 filler and IP 2007 web form publishing methods using a brand new blank form with two URLs simply typed as text onto the blank form canvas as follows and both links activate when the form is published to open using IP form services, but only the Yahoo link activates if the form is published to open in the IP client. IP form services is not an allowed option for me... Any ideas? Thanks!
http://www.yahoo.com
http://sharepoint.mycompany.com (The address of the landing page of my sharepoint 2007 host.)