My personal opinion is Clear Channel is just keeping Dieter off the air to appease these idiots who have never listened and making sure Rover doesn't talk about it until it blows over. The same kind of thing happened when someone picketed them (I don't remember the details) they told Rover he couldn't discuss it until it blew over.
I have a feeling we will either hear a little of the backstory in a few months or in a few years.
I mainly think Rover is pissed he can't talk about it (not personally deciding not to discuss it) because of some of the comments he made today. I think my favorite was when he was talking about making prostitution legal he said something along the lines of "Oh now the women's groups are gonna get all up in arms! GET THE F OVER IT. GET THE F OVER IT" - that wasn't the exactly line, but something like that. Definitely seemed like a coded message