Mine hasn't budged from 97% for I think over two months and around 500-or-so posts reported. I'm starting to think something is wrong with it too.
still working for me. i've reported 3 times in the past 2 days and they are all showing up m8.
Mmm, what is accuracy? are you guys talking about activity? or its something else

talking about "report to moderator" option at the bottom right of every message. accuracy means what % that your report was correct (as in, if the post is moved after you reported it).