This all happened when i was downloading a mod ( which will remain anonymous for reasons ). I somehow crashed minecraft, and had to download a new minecraft. I managed to recover my saves and texture packs, but I tried to install Modloader, and deleted META-INF. For some reason it gave me the black screen!
I can still play the game, but you don't know how laggy it is without Optimine. Is it something with the new download? My failure to understand computers? Damned robots from 2234 trying to destroy my computer? Please post and help!