I utilise dwf files embedded in html, The html code points to a CAB file that installs ADR 2009, ADR 2009 has a number of glitches that are fixed when using the 2011 or 2012 browser plug-in.
The problem is the 2011 or 2012 plug-ins require the user to install the full version of ADR, this is not a problem but because there is no updated CAB file a user without the viewer installed, when visiting a webpage would be prompted to download and install 2009 version. To overcome the glitches (avoiding the toolbars and pallettes opening everytime an object is selected) you then have to manually download and install the full version of 2011/2012 ADR which allows the toolbars to be disabled using script this does not work in the 2009 version)
Surely it would not be difficult for Autodesk to create an updated CAB file. I have hundreds of drawings hosted online for many customers and could really do with an updated CAB file
I am in the same boat just getting ready to launch a site with embedded DWF files hosted in a web page. All of the samples indicate how to specify the <OBJECTCLASSID="clsid:A662DA7E-CCB7-4743-B71A-D817F6D575DF"