With auto modes pictures are USUALLY sharply focused.
With manual modes (eg P/Tv/Av) i have to take multiple shots to get one picture that is sharply focused. This is with shooting at Large Fine/RAW, WITH a tripod. no shaking. the same whether i use single point focus or multi point focus.
You can't notice it if glancing at it in say 800x600 size ie half monitor size but if you take it up to say 1280x1024 ie fill my monitor or at full pixel size they're awfully out of focus.
At first i thought it's normal, but hey, in auto mode its bloody sharp! so?? lense problem? body problem? normal?
The shop can't tell me why. All they say is why dont you buy our lense instead.