I changed my site name but search engines still show the old name. Why?

When you chose to display a given site name (real name or username), it may be cached by some search engines. Thus, if you decide to change this name later, or to change visibility permissions for your site name, it will take a certain period of time for search engines to update their cache and stop showing the old profile or site name.

If you do not want search engines to show your old site name, you can apply to have it removed from Google caché here: 

http://www.google.com/support/webmasters/bin/topic.py?topic=8459