Windows Vista Business w/ SP2 Internet Explorer 8 (8.0.6001.18813) Adobe Reader 9 (9.1.3)
When accessing a PDF document using IE8, the PDF will not display in an IE browser window. Instead, the PDF opens in a new Adobe Reader window.
When accessing the same PDF in Firefox or Chrome, the PDF appears in the browser window.
I have tried repairing Adobe Reader using the Help>Repair Adobe Reader Installation menu, both by running Adobe Reader as an admin and not. I have confirmed that Adobe Reader "Internet" preference "Display PDF in Browser" option is enabled (checked). I have enabled/disabled this preference without affect. The PDF document is always opened in it's own Adobe Reader window.
I have tested this using different PDF documents served up by different servers. The result is the same. The PDF document is always opened in it's own Adobe Reader window.
How can I get the PDF to open in an IE8 browser window?