That email from Facebook telling you about a photo you were tagged in: DONT CLICK ON IT!
Apparently fake emails are being sent to email boxes saying “Greetings, One of Your Friends added a new photo with you to the album. You are receing this email because you’ve been listed as a close friend” Fairly harmless, yes? No, apparently the email, that looks eerily close to Facebook blue, is actually a trick to get recipients to open the Troj/Agent-XNN trojan. It disguises itself as a Sun Java update.
The email seems to come from a @facebookmail.com account which may be the first giveaway. So check your next “Facebook” email to make sure it is valid. Or just avoid that all by just going to the website or through your mobile to app to access The Facebook.