Ooops, caught out again.
Are there any javascript links on the page written in the form :
<a href="javascript:function()" ...
if so, try re-writing as
<a onclick="function()" ...>
I've seen some comments somewhere that a bug in IE5.5 means that it detects the javascript link as being insecure.
HTH
Mike
"I can live with doubt and uncertainty and not knowing. I think it is much more interesting to live not knowing than to have answers that might be wrong." - Richard Feynman