I have a form (2007 filler form template - deployed on SharePoint 2010, opens in infopath) and when it opens I am always getting a prompt saying a 'new version is available and to update the form'. Does anyone know a possible cause and/or fix for this as I am clueless.
Have you tried clicking on the prompt to update the form? Give this a try. I am not entirely sure how InfoPath pulls forms down from the server but, it may have a cache that stores copies of these forms.