I have installed Adobe Reader 9 and when we run our internal application that opens a PDF document hosted inside a AxSHDocVw.AxWebBrowser control (basically a form with the WebBrowser control added) - the PDF document displays just fine in both XP and Vista.
However, when the form is closed to return to the main application, XP has issues (the parent is "locked up") and the application has to be terminated in task manager. Vista has no issues. This process has never changed (our code) since Adobe 7. XP users are running IE 7 as well.
Anyone have any suggestions for a workaround? I approximately 3000 workstations to deal with here. :(