[alka]

Twitter has featured a favorite button in the shape of a yellow star since just after it was launched in 2006. People used it to show that they thought a tweet was particularly good, or to save something to view later. But Twitter says the symbol confused some people and has now replaced it with a 'like' button in the shape of a heart, which sits in the same place underneath a tweet.When the grey button is pressed, it explodes with color and the heart turns red.