Dozens and dozens of Google AdSense publishers have reported receiving an email from Google with the subject line, "Important Account Information." The email basically was a reminder to those publishers who have not yet accepted the updated terms and conditions from February.
The issue is, the email was sent to many publishers who have already accepted the new terms and conditions. As AdSenseAdvisor said in the WebmasterWorld thread:
Our team sent an email today with the subject line "Important Account Information", which was a reminder to accept the February changes to the Terms and Conditions. However, we have found that we sent the email to a number of publishers who already agreed to the new terms. We apologize for the confusion caused, and in the next few days we will be sending another message to publishers who received today's email in error.
What is a bit humorous to me, is that Google AdSense recently sent out a mass email to publishers who were not suppose to get that email. In November, Google sent out a tax update email that looked to be a bit "phishy," because it asked publishers to login and update their tax information. The email was sent to publishers who have completed their tax information already, and was a mistake - it should have been sent to only a select number of publishers.
Same here, this email should have been sent to only a select number of publishers who have not yet agreed to the new terms and conditions.