JRISKIN  3.7 is supposed to support the Pentax K10D. I tried both the plug and the converter and its corrupting the data passed about 65% of the file. Tried several files, same results. All in PEF format. I already switched to DNG (which works fine with or without this update), but I have some PEF's I took right when I got my camera and I was hoping to update them to DNG.  
(Version 3.7)

JRISKIN  The ONLY negative to this, is that if you need it for MPEG2 (which it handles amazingly) you need the quicktime MPEG2 codec.

Other than that this is the stuff...I just can't say enough good things about this product. In a much earlier version I noticed a small capability it was missing and emailed the author who promptly updated it in the next update.

Love it.  
(Version 1.5.1)