Some useful info I picked up from another forum about IE 6.0 and thought I'll pass it along.
When someone has his privacy sets to high, that red stop sign appears at the right of browser's status bar for all vb pages.
The work around for apache server is to make sure that mod_headers is added to the Apache build
and to place those lines in an htaccess file at the root of your site.
PHP Code:
Header append P3P 'CP="NOI DSP COR NID CUR OUR NOR"'
Works for me on my site with privacy sets to high, but all pages here and all vbulletin forums I have visited have it.
I do also once I remove those lines from my htaccess.
more on that:
http://httpd.apache.org/docs/1.3/mod/mod_headers.html
http://www.apacheref.com/ref/mod_headers/Header.html