The Inquirer reports that a user received an unusual error from Google when trying to access his Gmail through a Greasemonkey script. The error was a “lockdown in sector four” message, basically describing that the user account has been found to have “unusual usage” and the “account has been disabled for up to 24 hours.” The greasemonkey script was code that was used to help the Gmail user manage his Gmail emails. He recommends that you no longer use such unauthorized scripts until you hear back with permission from Google on the matter.
On a related note, Philipp Lenssen reports that many Gmail users have noticed that their contact lists have mysteriously disappeared. You can see from the Google Groups reports that it was only temporary, and the users now see their contacts again. Phew! Maybe we should all export our contact lists or manage them elsewhere?