I'm not sure if this will apply to other Intranets, or future Autodesk Design Review versions but, for what it's worth, it fixed a problem I had on ours. On my machine the browser would launch a blank window but the viewer and target DWF file did not display. This made demonstrating DWF use a bit tricky!
Stand-alone Autodesk Design Review and other machines worked fine. I thought it might only apply to our environment but it helped another Discussion Group reader with the same problem.
Had this on our intranet and this fixed it. Can't promise it will work there but for what it's worth;
Go to IE Options > Advanced Tab
Scroll way down to Security and check the following are not ticked;
- Allow Active Content from CD's to run on My Computer
- Allow Active Content to run files on My Computer
Also if your intranet uses Scripts to launch the page/viewer try re-registering;
Start > Run regsvr32 jscript
Start > Run regsvr32 vbscript