I wanted to post a heads up here in case anyone else runs into this problem.
The Alree Gel Faders screw up my install of Sonar 8.5.2. Sonar runs perfectly, but after I installed the Arlee Faders, Sonar crashes every time I click on the Matrix view.
Also, Buddy's button faders don't work in 8.5.2. It keeps telling me that I'm using the wrong version or the wrong file.