I also noticed this, from DPR, in relation to the new LED lights:
Quote: LED light convenient for movie and still-image recording
Both models incorporate a newly designed, high-intensity constant light LED. This white LED light comes in handy not only for close-distance movie recording, but also for still-image shooting requiring extended exposures. It also functions as a catch light in portraiture and an AF assist light in the dark.*
* The AF assist light function is available with 645D, K-r, K-5, K-30, K-5 II, K-5 II s, K-50 and K-500 camera bodies. The camera’s firmware must be updated to the latest version to support this function.
Looks like new firmware for all those Pentax bodies is on the way, especially as for example the latest K-5 firmware is quite old. But no K-x or K200D firmware is on the list