I just checked this website about my drying/yellowing/browning tomato leaves and while there was one fungus that may be the cause, I have the feeling I may be at fault for hitting them with the same epsom salts I used for my peppers. The thing is, I hit all my tomatoes with epsoms, but only those on the east end of the garden are giving me trouble.

http://aggie-horticulture.tamu.edu/publications/tomatoproblemsolver/

I know that not everybody is organic here, but I assume if it is a fungus, I can treat the tomatoes with a peroxide solution, any other ideas?