I acquired a site around 6-months ago. The site is 5-years old and previously operated correctly with both www.domain.com and domain.com.
My webmaster recently updated the site design and structure and removed www.domain.com (automatically resolving to domain.com).
Google shows the same number of inbound links for link:domain.com and link:www.domain.com, which tells me that the search engines are correctly recognising that everything should be attributed to domain.com.
However, my PR has recently fallen from 4 to 2 (perhaps for other reasons), so I'm not sure if....
1/ Should you really pick one or the other, or just let both exist?
2/ If you need to pick one, which do you choose?
3/ Is there any value to reverting the decision and picking a new version?
Hopefully this will create some interesting debate as I doubt there is a simple answer to this.