this is one that i think is female, because of the white pistils on the higher node.
http://aycu07.webshots.com/image/364...3650573_rs.jpg
im surprised u got hairs in 4 days, but maybe she was ready to switch.
i agree, prolly fem.

let the yellows drop, or, if they give up with a "light tug" take em.
dont yank the crap outta them.

i have been livin with yellows for weeks. dont sweat it. its part of the transistion. seriously, look at my log, i got yellows for weeks.
DO NOT forcefully take them early, it will slow your cycle.
and i know what a slow cycle is like, fawkin Thai, dammit.

burn doesnt really "heal", i believe leaf affected will not repair.
i would give straight water to flush out for a week or 2.
also keep in mind, the flower cycle will make yellows as she changes attention to making flowers, not leaf.

and make sure ur usin flower ferts at this stage.

the possible male, pic is too fuzzy and maybe too early.
get some Reverse and spray em if its a possible hermie.

my nickel worth

have a good grow.