The Facebook application on my W995 stopped working yesterday - it just brings up a screen with the "f" logo on, doesn't get to the log in / connection page.
Internet and email still work on the phone, and the software update says I have the latest software for the phone.
I can access the Facebook application from the "Applications" menu within Organiser, but not via the option within Messaging.
I have also lost the option to send photos to Facebook.
