See this latest K-7 user's bug report:-
http://www.pentaxforums.com/forums/pentax-dslr-discussion/75613-k7-reverting-firmware.html
Everything is clearly explained, and with sample photos posted which show the hot pixels.
In fact, Pentax have been silently updating the firmware "1.01" with minor revisions from (1.01.0)0.05 -> 0.09 -> 1.13 but it seems that whilst the vertical line issue resolution is of mixed results, other serious sensor issues were re-born.
Thursday, October 08, 2009
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Comments by IntenseDebate
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RiceLow · 805 weeks ago
Real Engineer · 805 weeks ago
That's just serious speculation and reaching.
I was going to suggest that you should at least get a K7 and test what you claim. Just to see if its repeatable and so you don't place your reputation into the hands of someone you don't even know by backing them without question.
Also he hasn't even tested to see if the firmware was the problem, he wants to get an older copy of it so he can tell if that is the problem or not.
You however have already jumped to the conclusion that it is not only firmware but also sensor issues.
You really have some talent at making wild assumptions then jumping to equally wild conclusions.
Are you sure you are an engineer?