Ario Arioldi
Member
The just released final version of LR 3.4 has profiles for more Pentax lenses.
http://blogs.adobe.com/lightroomjournal/2011/04/lightroom-3-4-and-camera-raw-6-4-now-available.html
http://blogs.adobe.com/lightroomjournal/2011/04/lightroom-3-4-and-camera-raw-6-4-now-available.html