Originally posted by Nightwings ...The K-x is my first digital DSLR and now that I can pixel peep, I guess it gets me paranoid .. On the other hand ... My FUJI S100fs is smack on ... razor sharp focusing one end of it's 14x zoom to the other.
I don't understand any paranoia. It's just a camera, not some sort of magic box. Relax a little.
And you do understand that the end-to-end sharpness you are seeing with your Fuji may have as much to do with the vastly deeper depth of field you get out of a smaller point and shoot's sensor than any wonderfulness of the Fuji AF.
As the owner of two Fuji point and shoots - an F10 and an F200 - I can say with confidence that the Fuji AF isn't infallible or anything especially amazing.
I also presume that you have been conducting your K-x AF tests with spot focus (ie using the centre AF point only), not any other mode. You need to do it that way for your results to be reliable and consistent.