There are many incorrect links in the online OF documentation.
Actually, all documentation pages for @class methods have an
incorrect link at the bottom, because of a known bug in the
generate_html package (see bug #41473). I
have just provided a patch for it on savannah.
By the way, the current generate_html package is from october 2012
and several changes have been made to it recently (including the new
"NEWS" and "Package Documentation" links, which can already be seen
in the doc of the optim package). Perhaps now would be a good time
for a 0.2 ? Please tell me if there's anything I can do to help.