Twitter is testing a major redesign to its service, according to some users who spotted a dramatic change to their profiles yesterday. The new interface is closer in appearance to Facebook’s profile design than anything Twitter has designed in the past. Most notably, the user’s profile photo is much larger and is off-set to the left side of the page. All of the content on a user’s profile timeline is scaled significantly larger, making it easier to view text and photos. The whole layout is strikingly more visual than the current profile interface.