Gustaf Neuman solveed the problem. I quote part of his message:
Aernout,
this is indeed strange. the DIV id="page-body" does not display in IE.
Try changing
#page-body {background: #fff; font: 10pt Arial, Helvetica, sans-serif;}
to
#page-body {background: "#fff"; font: 10pt Arial, Helvetica, sans-serif;}
in xowiki/www/view.adp
Can you please confirm this, whether this
helps in general? Strangely enough, i see no requirement that hexcolors
must be quoted.... maybe an IE bug?
And indeed, this helped!
Thanks Gustaf