I'm trying to extrude multiple faces of a cube at the same time but it seems to be locked to the z-axis. I'm relatively new to Blender and I've spent all evening trying to figure this out - it's driving me nuts. Even more annoying is I'm sure I've done this before with no problem, but now whenever I try to extend multiple faces it's locked to the z-axis. I even reset the factory defaults and it's still doing it. Please can someone tell me what have I overlooked?