There's been a concerted effort by gay activist groups (posing as non-partisan) to confuse Wisconsinites that "no" actually means "yes". Unfortunately, I live in a state full of useful idiots and many will probably fall for it.
Arizona and South Dakota may also reject bans -- if you believe the polls.
Interesting. I heard on the a caller from WI on the radio yesterday saying that while the Bishops were saying 'vote yes', there was a report that 150 or so priests said to vote no. The radio host hadn't heard of it, but if it's just a rumor, this may have some Catholics confused too.