Growth on Leaf

[img=http://img217.imageshack.us/img217/2382/img0023aev4.jpg]



Those are the growths on the leafs, if someone could please tell me what the problem is, and possibly how to fix it, would be much appreciated.
Cheers.

either mold or left over nutes from misting your plants

looks as if water had gotten onto the leaves and dried up........

Ok, will it harm my plant?

i wouldnt worry about it ...just try and make sure not to get the leaves wet when you water them ......