IS THIS MOLD?? PLEASE HELP..

Since i put the last crop in have noticed the leafs on the plants have become slightly discolord and are curling over. They are bumpy on the surface and some have a white/brown dust on them. Its not a nutrient problem either because all 4 tables have the same problem and i mix them seperately. Strain is Red hair skunk, i have to say it actually looks like im gona have my biggest harvest to date so it dosnt seem to be affecting the grown but still i want to sort it out.

http://img179.imageshack.us/img179/1696/dscf1142hq5.jpg

Hard to tell from the picture. Are you getting lots of ventilation? I see it looks like you're doing it in the shower,make sure you have a fan on.

Bathrooms and showering areas are bad about harboring mold and keeping areas too humid. I agree with Killer about the photo, it's just not easy to tell by looking at it. If you're able to take a damp sponge and wipe the dust away from the leaves, then it might be mold...but it could also be any number of airborne contaminates. If your humidity is above 50%, I'd recommend getting it down quick. 25-30% is a good range, and helps to prevent lots of molds/rot from forming.

Yess it does wipe off with a damp sponge im thinking 99% a mold problem. Its in a grow box type thing but it is quite well sealed and i have recently started to leave the radiator on the room out side of the grow box but still quite close. Think it has been heating up the grow room and because i dont have my extractor on at night causing to much humidity.. Thanks guys.. Fingers crossed..

Powdery mildew maybe?