Google: Changes in URL Queries
Matt Cutts writes explaining changes in the way URL queries are returned. Previously a search for [www.ironvine.com] would return the same as [info:www.ironvine.com]. Now when you do a query with a URL [www.ironvine.com] you get results as if you had used ["www.ironvine.com"] as a text search.
This was done in order to make things easier on the casual users to help correct mis-spelled URLs. The expert users can still use [info:www.ironvine.com] to search site specificly. I find the change beneficial to see some of the linkbacks to my site and can still use the info: prepend to search site specific.
"We can always tweak/refine/revert if we see problems, but this
change is beneficial for many of our users, and expert users can still
get the old behavior by just prepending an “info:†to their url
queries."