Looks like Yahoo has made some changes to the Site Explorer.
Now at the top when exploring a site you can see
Pages
aReJay
Now at the top when exploring a site you can see
Pages
I believe this shows all pages where there exists an inbound link
Inlinks
Seems that this may be all ******** pages (or perhaps all unique links)
Subdomains
Absolutely no idea what this is currently representing, as the pages shown here neither link to my site nor are subdomains of my site.
Comments....
aReJay