Originally posted by donutman_2000 That sounds like what happens when you have an M lens attached: you can only use M, video, and all other modes display as Av, like you say. It's on page 312-313 of the K-r manual.
If you're not using an M lens, then there is a problem with the electrical contacts between the lens and the body, making it think there is either no lens attached, or an M lens. I would try cleaning the contacts if that is the case.
You were right. Just detached the lens, attached again and the mode selector started working correctly again. Everything's normal now. Hope the e-dial problem doesn't happen again. Thanks everyone!