Ashton Kutcher Apologizes -- Oops, Paterno Did What??!?

Ashton Kutcher attacked the Penn State Board of Trustees for firing Joe Paterno last night -- but there was one little problem, seems Ashton didn't know about Joe's misdeeds.

Right after Paterno got the chop, Kutcher tweeted, "How do you fire Jo Pa? #insult #noclass as a hawkeye fan I find it in poor taste."

Almost immediately, Kutcher was attacked by people informing the actor about the situation -- writing things like, "F**k you. He covered up child rape you sick, geriatric f**k."

Roughly 30 minutes later, Kutcher removed his original tweet -- and replaced it with, "Heard Joe was fired, fully recant previous tweet! Didn't have full story. #admitwhenYoumakemistakes."

He later continued, "This is an insane story, I just heard paterno was fired, getting the rest of the story now... Wow."

He added, "As an advocate in the fight against child sexual exploitation, I could not be more remorseful for all involved in the Penn St. case."