When Facebook began rolling out its new privacy platform, users began noticing that their Friends List had become public and could not be hidden.
The list includes the identities of everyone the user has 'friended' and some users don't want the information made public.
Businesses and their users should exercise special caution because of the relationships - both business and personal - that may be revealed through a user's Friend list.
These could be mined by competitors or in some cases used to develop competitive intelligence about a target company.
"We have heard user concerns and we will soon enable people to hide their friend lists. Those who choose to hide their friend lists will not have their lists discoverable through search engines or viewable by other users," Facebook said.
Readers had expressed concern that making Friends Lists public could allow businesses or repressive governments to misuse the information. They felt - with reason- that Facebook's new privacy controls made the information easier for third parties to misuse.
"We believe that Facebook, as demonstrated during the Iran elections and events in multiple other countries since our inception, plays a critical role in allowing people to communicate, organise and stand up against oppressive regimes and there is real value of connecting and sharing, which is what we're trying to facilitate," said Facebook.
Facebook said that it would still be theoretically possible for an application the user had approved for access to the Friend List to misuse the information, and this could, theoretically again, include some sort of rogue app or malware.
It is possible there is no risk here, but given Facebook's history of privacy flaps, there is reason to be concerned, too.
My take: I am not 100 percent clear on what Facebook is doing to protect users's Friend Lists. I know the information, in the wrong hands, could be very damaging to some users in both their personal and business lives.
I believe Facebook has become sensitised to the issue and expect to see changes, perhaps beyond those announced late today.
The rollout of Facebook's new privacy options has, at a technical level, gone less than smoothly, taking more time than expected. There have also been changes made during the rollout that have added to the confusion.
Facebook users would be wise to revisit their privacy options over the next few days and make the changes they consider appropriate. Even if you have already made changes, it is important to check the options available as things remain fluid.
While I am concerned that changes announced in July and rolled out in December are still not right, Facebook probably deserves credit for responding quickly to unforeseen problems.