Is this a known prob with the H5?

I was looking into buying an H5 after the H9 let me down.

I read through a bunch of German forums and also German amazon reviews, and it appears that the H5 has an autofocus prob. About 3 out of 5 people say that after taking like an average of 400 shots, the autofocus button (when pressed halfway down) stops working, meaning you can only push the button all the way down when taking a picture.

Is this some sort of known problem? I've searched the forum here but couldn't find anything about that. Is this BS or a generally known problem with the H5?

Man, why is there always something that turns up, just when you think you found the perfect cam and decided to buy it...