What is your exact scenario? I don't see this occuring when the database is either the main data source or a secondary data source.

Signature
Greg Collins [InfoPath MVP]
Please visit: http://www.InfoPathDev.com
It seems that the screen tips do not appear when the form is connected to a
database, but will appear if there are not any connections and the form
stands alone. Is this a bug or is there a workaround for this?