Previously I changed
my portfolio page contents vertical centring from < table > to
a CSS method recommended by
World Wide Web Consortium. I also changed embed method from < embed > to < object > to meet
the W3C standards. Than I realised that the simplified < object > is not supported by IE. A solution to this issue was found on
A List Apart: Articles: Flash Embedding Cage Match with a link to the very useful
Flash embed test suite. The method I use now is so called 'The nested-objects method (with Internet Explorer conditional comments)'.