You cannot use Internet Explorer in compatibility mode while running ADF Faces pages.Please see Supported Platforms in the following link http://jdevadf.oracle.com/adf-richclient-demo/docs/release.html. Recently a check has been added in ADF Faces framework to alert you if the browser and document modes are not equal to the version number of the Internet Explorer that you are running.
How Do You Find Out The Compatibility View Settings for IE?
Click Alt on your IE browser. That will bring up a new menu. Click Tools > Compatibility View settings. In the Compatibility View Settings dialogue window, locate the URL for your application from Compatibility View list and then click Remove. Also, uncheck all compatibility mode options as appropriate.
While running your page, you can check the compatibility mode of the browser by pressing F12 (if your on IE 9 or higher). When you press F12, you will get Developer Tools window with lot of information :)