pic - 100x300, for request page # pic_big - 200x600, for profile page # pic_small - 50x150, for wall posting # pic_square - 50x50, everywhere squre (comment, invite ..) FACEBOOK_DEFAULT_PIC = http://static.ak.fbcdn.net/pics/s_silhouette.gif FACEBOOK_DEFAULT_PIC_BIG = http://static.ak.fbcdn.net/pics/d_silhouette.gif FACEBOOK_DEFAULT_PIC_SMALL = http://static.ak.fbcdn.net/pics/q_silhouette.gif FACEBOOK_DEFAULT_PIC_SQUARE = http://static.ak.fbcdn.net/pics/q_silhouette.gif