it looks like you have to login again at the top -- it worked for me.
if that doesnt work, then i guess there is a post limit. i didnt know there was but maybe its to keep spamming down?
EDIT: i didnt have to create a new account! its the same as my SN account and such (unless i did that on purpose, but i dont recall creating an account there and i havent sold anything or bought anything....strange...)