EOS 20D - focus error

[SmartWombat]

I've seen in a few other forums mension of 20D focus errors.
I've noticed a lack of focus in most shots, when using all my L lenses wide open.

I did a little test and it seems 5mm too short, at 70mm on the 24-70

Which is why when I put the centre AF point on the eye (my wife and cat are bored of that game now) the iris isn't sharply focussed.

Can I ask for a second opinion please?
Let me know if you want the full resolution multi-megabyte versions of these reduced images ...

#1 a simple tool !
#2 the ruler is at 45 degrees (so is the tab) focus seems best at 7mm on the ruler which is 4.9mm in real life
#3 it looks like about 5mm to me in the head-on shot too