those who don't come often to twitter.com (as myself) or those not heavy users (so not "in a beta group") might have missed this announcement.
New! Retweet to share tweets (BETA)
twitter.com: Hi there, you're part of a beta group receiving this feature, which means you may start seeing retweets in a new way. People who don't have this yet will see your retweets prefaced by "RT".
Keywords: beta group, retweet, share tweet, social media, tweets, twitter, twitter.com, twitting, web 2.0, beta
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