Originally posted by k100d that's good to hear because there was a formal test done which said the Pentax anti-dust system was next to useless, with olympus being the winners. don't have a link handy, but they also mentioned that the REASON they did the test was that the K10D system was useless.
Yeah, I saw that too (and it's actually why I'm bothering to post this). In the test, they leave the cameras open on their backs overnight in an intentionally dusty environment. This doesn't necessarily mirror the real-world situation.
I think it does tend to demonstrate that there's room for improvement in Pentax's system — but my experience shows that it's better than nothing.