In our MOSS2007, environment we've had issues in the past with users getting the "InfoPath could not submit the form" message. Our "fix" was to uncheck the "Display intranet sites in Compatibility View" on the Compatibility View Settings screen (see below). However, since yesterday, I've been trying to resolve an issue where a user could open an InfoPath form from the Form library, but got an error message when she tried to open the same form from the workflow task library. Another user in the same office was not experiencing the issue. So we began to compare settings, looking at Add-ons thinking that was the problem. However, nothing we changed in the Manage Add-ons section worked. In correcting an unrelated issue with PeopleSoft screens in the browser (items were overlapping each other), we noticed that the second user had "Display intranet site in Compatibility View". So we went back to user 1 and checked "Display in...