The Washington Post reports on a Facebook spam attack causing graphic images to be posted on some users' profile pages. The company said it is working to shut down the accounts of those responsible, the report states, and that the attack did not appear to compromise user data. Meanwhile, USA TODAY reports on the social network's acknowledgement that it uses tracking cookies to keep logs of the Web pages its users have traveled to in the past 90 days and where non-users have visited after they've gone to Facebook's website. Reps. Ed Markey (D-MA) and Joe Barton (R-TX) have written to Facebook CEO Mark Zuckerberg asking him to explain the company's tracking practices by December 1. (Registration may be required to access this story.) 
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