Have any Lego sets been released with errors/mistakes in the build instructions? If not, why not?
My 7190 Millennium Falcon kit has a mistake where the inventory for the page doesn't include two pieces on it. So, invariably, when I'm building it I forget to include those two pieces, and they are left over until the very end, at which point I have to follow this process:


Say "Dammit"
Flip backwards through the booklet to find the page that last added those parts
Disassemble the model part-way
Add the parts back
Re-assemble the model
Say "There. NOW it's finished."
Swoosh the model a bit.


Here are the two instruction pages showing the error. On the second page you can see that the dark grey upward sloping pieces at the front are added, yet don't appear in the page's inventory list.