My company has been experiencing issues trying to open PDF's. When we try to open images that are hidden behind a vendors firewall using a ".aspx" application to open them we get a blank browser window. If we change the internet option to not open in the browser window we get an error that IE cannot download the .aspx file access denied. When we try to open through Firefox it opens the file fine. This started happening with the IE 7 update issued on 2/12/08. Before this we had no issues opening in IE7. This happens on multiple versions of Acrobat. I have personally seen it do it in Acrobat 7 and 8. I created a virtual PC and installed all the MS updates and Acrobat 8.1.2 and it won't work. If I uninstall IE 7 I can open the files fine. Can anyone shed some light on this problem? I have tried completely uninstalling Adobe Acrobat and making sure all files and registry keys were deleted but this did not help.
I discovered the issue stemmed from a group policy setting that I had instituted was preventing them. The policy I had created had the policy "Computer Configuration|Administrative Templates|Internet Explorer|Internet Control Panel|Advanced Page|Do not save encrypted pages to disk" set to enabled. This apparently prevented the PDF files from displaying.