guys check this site out.........
*www.orkutplus.org/2008/05/hack-enjoy-10-orkut-themes-before-they.html
Okay Mystery solved......
it is in your edit profile with a tag theme or for the lazy ones here is the link for changing the theme... and this is available for all orkut users...
*www.orkut.co.in/EditSkin.aspx
MODS CLOSE THE THREAD>>>>>>