Sure, most of you must have already upgraded, if not, and you haven’t heard the news yet. You should upgrade your WordPress 2.1.1 installation right away. Don’t delay further, just download
 WordPress 2.1.2, and head over to updgradation.

Long story short: If you downloaded WordPress 2.1.1 within the past 3-4 days, your files may include a security exploit that was added by a cracker, and you should upgrade all of your files to 2.1.2 immediately.

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WordPress, WordPress 2.1.1, WordPress 2.1.2