Google has implemented a new feature to assist the users. Matt Cutts wrote in his blog that Google has introduced the changes keeping in mind a "gentle reader" and not a typical user. All users are not power users and many get lost and are unable to find the website they were attempting to go to by simply typing the URL. Google mow has a better way of handling the url queries. Where, previously the query was treated like info: www.example.com giving the single url in the index, it would now be treated as "www.example.com", returning the ten best matching urls.
Matt Cutts explains the reason for introducing this change- "If super-duper power-users who know how to refine
site: or info: are a set of people we’ll call N, you are probably in that set N. There is a whole different range of people
M who just type in www.example.com to get to www.example.com, and who sometimes misspell the url. In math,
M >> N means that M is much greater than N. That is, there are many more people who casually type in urls to get to
those urls (and who sometimes misspell those urls) than there are super power users. So this change helps M. The N
power users can just prepend “info:” to get to the old behavior.
Let’s take an example. Suppose the query is [www.mysace.com]. If you go visit that domain, you get a 404 error.
Most likely, what happened was the user was typing [www.myspace.com] and accidentally left out the “p” from
myspace. Which behavior is more helpful to that user? Here’s [info:www.mysace.com]:"