If you go into Blogger Help to see what the heck they did to make word verification for comments so much more irritating than it used--and needs--to be, you get "Page Not Found."
Are they getting so much heat that they had to take it down? Maybe it's overwhelmed by bloggers wanting to go back that it crashed?
I suppose the change may have been prompted by the recent rash of spam commenting, but... Hey, Google! The new system sucks, let us use the old one.