SAN FRANCISCO -- The NFL can be fickle both in perception and in reality.The San Francisco 49ers could have easily extended their win streak to six games and gone into New Orleans on Sunday with a hard-earned victory on their resume.Instead, the 49ers -- who lost 10-9 to the visiting Carolina Panthers in a game that had a January feel -- will enter Week 11 facing questions about whether they can beat a good team and have fallen too far behind the Seattle Seahawks in the NFC West hunt.