> "If you only want to change the title of the site this is even  
simpler.
 > Open up your web-browser, browse to 'Environment', then 'Header', hit
 > 'Settings' and change the title field from '%k' (the name of the
 > current *k*ernel) to something else."

This is odd, following my instructions it works for me. What version
of Pier are you using? The image I have here is Pier-Model-lr.87 and
Pier-Seaside-lr.82.

Cheers,
Lukas