Fusible: A common typo of a web address, often happens when a person leaves out the period "." after the "www" when typing the domain into a browser. In fact, hundreds of disputes have been filed over these types of domains over the years, with nearly every case decided in favor of the complainant. Now, Facebook appears to be the latest top site to get control of its www typo address. Earlier this month, the Whois record for wwwFacebook.com changed to Facebook Inc. Given that Facebook.com is one of the top sites on the web, you can imagine what kind of traffic the typo received. A rough estimate by Compete, puts the number of unique visitors at over 250,000 just in the month of April.