I am not totally sure but I believe a hot pixel will render white and a dead pixel will render black. As far as dust, most dust spots will cover more than one pixel and tend to show as oof blobs, sometimes quite large. That is where the blower bulbs are really handy.
I have had to clean both my sensors with the blower several times, including the K10D. Fortunately I have been totally successful to date! No pixel problems with either camera. Walt -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
