Yahoo files more patent claims against Facebook - Yahoo today filed two more advertising-related patent infringement claims against Facebook. Yahoo criticized the social network for purchasing patents specifically as means of retaliation against Yahoo. Facebook responded with the following statement, ”We remain puzzled by Yahoo’s erratic actions. We disagree with these latest claims and we will continue to defend ourselves vigorously.”

Instagram acquisition may delay IPO - Reuters reports that Facebook’s acquisition of Instagram and recent patent purchases may delay its IPO by about a week, pushing the initial public offering to later in May.

New Facebook for Windows Phone App - The new Facebook app for Windows phones includes features such as full thread messaging, the option to tag friends at locations, delete posts and comments, and ability to Like comments.

Facebook focuses on security - Facebook is testing a new product called Support Dashboard, which gives people who use Facebook more insight and visibility into what happens after they report content or other users on the site. From the Support Dashboard, users can see if their report has been reviewed by Facebook and receive an alert when a decision has been made about a report.