In the past, my other AF Pentax bodies have focused fine in situations where the *istD does not. I was "throw off" by this. It seems the *istD has issues with AF in certain situations. That is when I had the idea of getting a faster zoom in place of the 16-45 4.0 I have now for the *istD. It was just an idea. :) After reading the comments here, I'm going to pickup a few more primes and keep the Pentax digital zoom. That zoom comes in handy sometimes.
Thanks, Chad
