MOSS MySites are an odd bread of site collection. And when it comes to customising them with new masterpages and themes, the branding never seems to be applied to MyProfile pages. This is because the MyProfile pages is lerking an a separate site collection outside of My Sites. I discovered this after reading Mark Arend’s posts ‘MySite Pages and Architecture’:
http://blogs.msdn.com/markarend/archive/2008/02/22/mysite-pages-and-architecture.aspx
You’ll discover that MySites incorporate pages from a separate PROFILES site collection. Also, applying styling to a profiles pages is applied across everyone’s MyProfile page as there is only ONE profiles site, unlike the separate MySites.
