If you are a K20D user shooting PEF and using UFRaw, you need to download the CVS version to view the K20D PEFs due to different WB presets being needed compared to the K10D (different sensors). Here is a paste from the CVS website of UFRaw:
wb_presets.c 1.93 4 weeks nkbj Add PENTAX K20D WB presets.
So the changes needed to the K20D's white balance presets have only been in UFRaw for a month. I have compiled the CVS version and it works fine now with K20D PEFs. The UFRaw repository can be found at:
UFRaw - Home
and look for the CVS link on the left navigation menu. Incidentally, I have found that the best way to deal with installing CVS versions is to use "checkinstall" installs a compiled version of a program into your systems package manager format (e.g., it uses the .deb format on my Ubuntu Hardy box) and allows you to use your system to installl and uninstall it rather than you doing it by hand.
BTW, a juicy rumor floating around about the next release of UFRaw is that it will have some kind of sharpening tool built into it. The only reason I am still a LightZone user is that its sharpening tool is the best around...well, ok, the Zonemapper and Regions functions are great, too.
Jack
recent K20D convert (and waiting patiently for the next firmware update to allow selectable NR...)