Help, what does this mean?

I just noticed that some of leaf has folded a little together. What does that mean? and in the bottom of some of the plants, the bottom leaves has wither a little. Check the pictures. Pleeeease help me!
http://img717.imageshack.us/i/dsc01280b.jpg/
http://img46.imageshack.us/i/dsc01278k.jpg/

... Also i was wondering if there was a schedule for trouble shooting for growing?

When the leaf fringes curl inwards it means that its hot in your grow room, what temp you running at, also whats your PH and EC