Further to my last two reports on this problem with the K10D:-
http://ricehigh.blogspot.com/2006/12/report-of-burnt-k10d-rtf-built-in-flash.html
Here is yet again a thread in which two K10D users write the same:-
http://www.pentaxforums.com/forums/pentax-dslr-discussion/1760-k10d-internal-flash-not-working.html
I *hope* Pentax could seriously look into the problem and take necessary remedial action promptly, e.g., product recall, revise the design, improve quality control, and/or etc., whatever is/are applicable and appropriate.
Well, I was the very first one to bet that this is not an isolated case but of course many brand loyalists disagreed, just see my first report one month ago:-
http://ricehigh.blogspot.com/2006/11/case-of-burnt-k10d-rtf-built-in-flash.html
Anyway, now that this problem has been widely regarded as a commonly known problem for quite some K10D units.