However, at least one security expert maintains the social network should have gone further to protect users' privacy.

As good as the new changes are, Facebook missed a real opportunity to advance privacy on its network, says Graham Cluley, a senior technology consultant with Sophos, a cyber security software maker. "A lot of these things are quite cosmetic," Cluley told PC World. "They could have done more about general privacy and safety on Facebook."

"Some of the things they've done here are great, and they're a step in the right direction," he added, "but I worry that there are more fundamental opportunities they could have taken which they ignored with this revamp."

One of those opportunities cited by Cluley was to put more "opt-in" choices in the Facebook system, instead of requiring users to "opt-out" of its offerings. "They've put a nice varnish over Facebook," he said. "But what we haven't got is anything which says, 'From now on, whenever we introduce a new feature, we're not going to share your information without your express agreement."