Over code listing 9 the text reads: "If you have a multi-CPU Opteron system, you should activate "Symmetric multi-processing support":" I propose we change it to: "If you have an <a href="http://multicore.amd.com/en/Products/">AMD multicore product</a> (e.g. an AMD 64 X2) then you should activate "Symmetric multi-processing support":"
Added X2 mention. Thanks for reporting.