You know that those embarrassing vacation photos that you posted on your social profile page last year may come back to haunt you, which is why you went back in later and deleted them. Problem solved, right? Maybe not.

A recent Cambridge University study, photos deleted from photo sharing sites such as Facebook were still available thirty days later.

According to the BBC, sites like Facebook store photos in one place and their main page in another, which can account for a delay from the time that you delete a photo to actual photo deletion. Seven of the sixteen sites tested, including Facebook, failed the test.

Facebook allegedly denies the findings of the study, telling CNN.com that “when a user deletes a photo from Facebook, it is removed from our servers immediately.”

Whether the findings of the study are accurate or not, studies like these serve as a warning to anyone who posts photos online—make sure that you aren’t posting anything that would embarrass you if your co-workers, clients, relatives, friends, or potential employers saw it.

Popular social networking site Facebook has undergone some major
renovations, but not all users are pleased with the changes.

CNN.com reports that it has received more than 200 unsolicited
emails from Facebook users, complaining about the new Facebook,
and that several petitions are circulating online, asking
Facebook execs to give its users the option of going back to the
old format. One petition, begun by Scott Sanders, a student at
Austin Peay University in Clarksville, Tennessee, has more than
1.5 million signatures.

The new look was first introduced in July, and users were
initially given the option of switching to the new format or
keeping the old one. This transitional period expired two weeks
ago, when the old version was eliminated.

“It’s tempting to say we should use both designs,
but this isn’t as simple as it sounds,” Facebook
co-founder Mark Zuckerburg on a September 18th blog post on his
site. “Supporting two versions is a huge amount of work
four our small team and it would mean that we would have to
build everything twice.

In 2006, Facebook was the target of protests when it introduced
a tool called “news feeds” which automatically
broadcasts users’ personal details.

Facebook founders are hoping that this current protest will
eventually subside as users become more familiar with the new
format.