I don't understand what happened, but I was working on making some custom control classes for cameras, and suddenly now when I go into edit the control type for the monitor, the drop down is empty (except for the None option). When I click the edit link next to it, I see all the control types there, but the drop down has nothing. Even stranger, I have ONE monitor that the drop down is populated correctly, but even a new monitor doesn't have the control capability. I wiped the entire db and started fresh, and same problem. I removed all modified script files from the server, and still the same problem.
What the heck did I do?