When I click on http://www.cpanel.net/docs/cpanel/ from Firefox 2.0 (SuSE 10.0 linux), I get a window with 3 tabs (Contents, Index, Search), but the page is otherwise empty.
I am not experiencing any problems accessing that URL in Firefox 2.0 on Mac OS X or Safari on Mac OS X. The documentation page appears to be online and fully functioning.