i'm no professional, but I think those pots might be a bit large for the size of the seedlings there, also ocean forest might be a bit hot for them being as little as they are...but all in all i think they look fine, maybe its me, but it looks like the only leaves affected are the bottom set. Stems may be purple due to lower temps, (but I don't think thats a serious issue) what is the temp with the lights off? I'd probably just leave them to grow for a few days and see if the crispy leaves progress up the stem, or just stop where they're at. My last grow had crispy leaves like that on the first node, but it never went any higher up the stem.

As I've said I'm no pro, i've gleaned most of the knowledge i've gotten from reading the forums here, and the rest from practical experience (trying my own way and screwing it up so i have to ask for help here :P) Maybe one of the regulars could either confirm or deny my info