I just received this email and the date on the bottom of the email is dated 3/12/2011. These phishing mails must be floating around for a long time. No, I did not get concerned and follow their instructions and I would recommend that if you receive the same just delete it.
This e-mail has been sent by the PayPal Account Review Department. Unusual charges were recently detected to a credit card linked to your PayPal account. Due to this, access to your account was limited. There were numerous log-in attempts by an unauthorized user to your account. To ensure greater security, we have limited access to your account. We have attached a file in this e-mail for you that will verify that you are the legitimate account holder (owner). Please download and open it in your browser. (This security breach issue may be found under reference PP # 283-448-105)
Thank you for your immediate attention to this matter. Please understand that this is a security measure taken by our security team intended to protect you and your account. We apologize for any inconvenience. Sincerely, PayPal Account Review Department – 03/12/2011