This is related (?) to http://www.dnnsoftware.com/forums/forumid/108/thre... and several others.
Site Settings Page dropdowns get waiting icon and inspect element gives me this error.
3 Uncaught TypeError: Cannot read property 'parameters' of undefined dnn.jquery.js:2640
Uncaught TypeError: Cannot read property 'length' of undefined dnn.DynamicTreeView.js:625
This is occurring on both new and upgrade versions of DNN 07.03.02. Server is 2012 R2.