FB just did an update for their Facebook App. On 100's of not 1000's of iPhones and ipads it's crashing 2 or so seconds after you click on it. It's been reported to FB. I grabbed the one from the App store that has not been updated as yet and am back to normal till they fix it.

Just a heads up in case yours won't load up. Some say it's worse on IOS7 but my 3gs with IOS 6 crashes also.