I had the same thought. Many of the counties mentioned (such as Broward) have Democratically controlled election boards. If there was fraud, it happened under the direct control of the Democrats. My feeling is that there wasn't and that the new machines gave a better accounting of the votes in counties where the accuracy wasn't so good in the past. It is very telling that the liberal Berkley professors don't even consider this as a possibility (at least they don't mention it as being a plausible explanation in their paper).
Here's an example...
I really hop ethat they keep pushing these theories. They didn't lose because their candidates are North East Leberal Elite snobs that can not connect with the average person. They didn't lose because they are aligning themselves with kooks and anti-american freaks. They lost because W rigged the electronic voting machines in Florida!!!