the past three days I've been getting a white screen when I submit a post, update a widget or make any changes. when a reader submits a comment, they get the blank white screen. i hadn't changed anything when this started. i am logged in on one computer and i'm able to post from it, but i can't log in on my other computer. Again, I changed nothing. Please help.
my site is http://www.thefamilytrifecta.com if you would like to see what happens when you submit a comment.