Originally posted by jolepp Ufraw + gimp has worked quite nicely for me for the actual processing. Occasional problems (a strip of junk at the right edge) with K-5 .DNGs though. Should see whether there has been an update though. With ufraw the thing to discover was that gamma needs tweaking, gamma=0.35 and linearity=0.063 would seem to produce results that are reasonably close to camera JPEGs with the default settings with both the K-x and K-5.
+1 for UFRaw. BTW, the pink "strip of junk" and gamma issues mean you need to upgrade to 0.18, as older versions don't support the K5.