• Financial Times, Tuesday, March 29, 2011 11:54 AM

Despite previous efforts to clean up its network, Twitter still seems to have a spam problem. As FT.com reports, Fred Wilson, a Twitter investor at Union Square ventures, just tweeted: "Apparently my twitter account was DM'ing people who @mentioned or RT'd me since this morning. No idea how it happened. Sorry for the spam". What's more, FT.com writes, F-Secure, an internet security company, has noticed that spammers appear to have worked out how to game Twitter's very own @TopTweets account, which has more than 1 million followers.

About a year ago, Twitter said it had reduced the percentage of tweets that were "spammy" from a peak of almost 11% in summer 2009 to less than 1% in February 2010, it said. No word on the present percentages, but, based on these anecdotes, it doesn't look encouraging. Unable to get comment from Twitter on the state of its spam issue, CNNMoney.com writes: "Hopefully, dealing with spam is on the to-do list of Jack Dorsey, now back 'leading product' at Twitter as the company's executive chairman."

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