Assume you created an InfoPath form with some SharePoint list data connections and Rules, you run this form from SharePoint with
IE browser and you get:
This because how the IE Praser works, please refer to: Error message: "A script on this page is causing Internet Explorer to run slowly"
Also you can download hotfix for SharePoint 2010, InfoPath 2010: SharePoint Server 2010 hotfix package (Ifswfe-x-none.msp): August 28, 2012
* This hotfix exist in August 2012 CU: SharePoint Server 2010 cumulative update package (SharePoint server-package): August 28, 2012
Also you can download hotfix for SharePoint 2010, InfoPath 2010: SharePoint Server 2010 hotfix package (Ifswfe-x-none.msp): August 28, 2012
* This hotfix exist in August 2012 CU: SharePoint Server 2010 cumulative update package (SharePoint server-package): August 28, 2012