Originally posted by Crosshair Going through my .DNG archive I can exhibit more examples of this AF character, which you may call "Photohrapher Error" to exculpate your loyalty.
This image is misfocused. The camera is simply not to blame here. There is good light, and the auto AF 'decided' on the guy in the red shirt. It is definitely photographer error, and there is no loyalty to the K-5 involved here. Your own image archive may well show more of such erroneously focused images, but if they are of the same problem as above, then you will find little difference from auto modes between the K-5, other Pentax cameras, or indeed cameras of other brands. Get off the auto AF point mode, use centre-point focusing and all of a sudden ALL your images using the centre AF point will have the intended subject in focus.
What the K-5 has had issues with is focusing accuracy in low light, particularly at night, where it has exhibited consistent gross front focusing. Low tungsten lighting also poses a challenge for the K-5, and Pentax are no doubt aware of this.