What makes the content of this web page
(which is allegedly W3C checked, and doesn't seem to have any serious
syntax errors reported when you test it there) invisible on NetSurf when
you view the page on their servers, but visible if you save the HTML and
double-click on it locally?
When I view it in their server I get what you describe (white area
surrounded by stuff that looks normal).
But if I save it and then the whole layout goes to pot, with a lot more
white space. The missing content does render, but several window-depths
down the page.
I did a full save, which included several CSS files, but the behaviour was
still as above.
Maybe it is to do with the spelling of 'artical' (sic) which appeared in
the empty space at one point (but I can't re-create it).