A few days ago somebody told me that the ShiftOut tutorial has the capacitor problem.
This could be one reason why I had problems in my last project where I used shift registers.
Also some pins of the Circuit Diagram are at the wrong position.
And I miss an important note:
Each output pin allows 35mA, but the current amount of all pins together has a maximum of 70mA. Very important!!
Additonally it would be useful to have a "See also" section, e.g. with links to similar ICs which are usable for higher currents.
Who is the administrator? Who can we ask for an update?
An other solution would be to create a copy in the wiki. There everybody can improve it.
I'm active in the Ogre 3D (game engine) community. There we have good experience with tutorials in the wiki. Several people made useful edits. For the Arduino tutorials we could go the same way.
My suggestion:
Create a copy of all tutorials in the wiki. And at the "old tutorial URLs" add a link or auto forwarding to the related wiki pages.