BERKELEY - Three people were arrested early today during a scuffle with UC Berkeley police near Memorial Stadium, where tree-sitters have been camped out in a grove for 11 months. Protesters said the clash happened after about 50 people walked over to grove late Wednesday as a show of support for the sitters, who are hoping to save about 100 trees from a proposed $125 million sports training center. Protesters and their supporters have been engaged in a waiting game with university officials after a judge ruled last month that the university can remove the tree-sitters, even if they are...