On Wednesday, users discovered a glitch that gave them access to supposedly private information in the accounts of their Facebook friends, like chat conversations.

Not long before, Facebook had introduced changes that essentially forced users to choose between making information about their interests available to anyone or removing it altogether.

Although Facebook quickly moved to close the security hole on Wednesday, the breach heightened a feeling among many users that it was becoming hard to trust the service to protect their personal information.

From The New York Times