Has anyone noticed a decrease in AF accuracy on bright sunny days where your team is wearing white jerseys. I am often disappointed in the keeper rate in these situations where the camera/lens seems to focus nowhere in particular even though it says you've locked on the player. I noticed it seems to be worse with the 400 than with the 300 I used to own. Does the bright white fool the AF system? Just wondering if anyone else had some of these troubles over time. Sunday the soccer game was at 1pm and it was particularly bad. I post an example: 1st frame shows the blurry jersey and face, 2nd is better. 3rd frame I can't figure out but the "brightness" made the AF jumpy I recall. I didn't keep any of these for submission obviously.