My company writes software that generates PDF files and then displays them in either a FRAME or IFRAME. For one of our customers, for the users that have Adobe Reader 9.1.3 installed, if we programatically set the src of an IFRAME to a PDF, the content of the IFRAME just stays blank. But if they browse elsewhere from within our software and try loading the exact same PDF document in a FRAME, it loads fine. Our customer's users that are experiencing the problem are running on Windows XP SP3 using Internet Explorer 7 with Adobe Reader 9.1.3.
I've installed 9.1.3 on my Windows Server 2003 developer machine and I do not experience the problem. I had the customer send me screen shots of all of the IE settings in the Advanced tab and for the appropriate zone in the Security tab. I changed all of my settings to match and still could not replicate the problem.
I'm not sure what else to have the customer try. Any suggestions would be greatly appreciated.
In case anyone else runs into this problem, I wanted to make sure that the solution got posted. When comparing all of the Advanced Settings and Security Settings, one thing was missed. Our customer was accessing the site using https while in our attempt to duplicate the problem, we were not. The setting that was causing the problem was the Advanced Setting of "Do not save encrypted pages to disk". If that is checked while browsing to a site using https, the described issue results.