[Mediawiki-l] Sub domain www disappeared after Mediawiki 1.5 Beta 3 upgrade

[sarath chandran]

All:

I recently upgraded Mediawiki from 1.4.x to 1.5 beta release 3. The upgrade
went fine and all functionality as mentioned. However, I notice that www sub
domain is not being referenced. All the pages are referenced as
http://foo.com instead of http://www.foo.com. I am sort of lost here and any
suggestions will be of help

Thanks
sarath