Help Samsung Fascinate Facebook issue.

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I have a Samsung Galaxy S Fascinate that I picked up on ebay. I downloaded the facebook app from the google store. I can log in. It either shows the loading icon or connection problems. It does this under Wifi and regular Verizon coverage. I can open it on the browser and it connects (but gives me security warnings about the certificate not being right). I can upload photos. It just keeps spinning the loading thingy. Verizon techs could not help on the phone. Any suggestions??