second pic looks like tip burn, third looks like bleaching. tip burn means you're running a little too hot with the nutes. back off a hundred or two on the ppm. bleaching is caused by thte lights being too close, but is no big deal. as for the rest, i've never had a grow where i didn't have an odd looking leaf here or there. if it bothers you, just cut it off. if you're using cfl's remember to not use the same nute strength you would if you were using hid lighting. you need to go lower since the cfl's aren't going to allow the plant to photosynthesize the way hid's do.