Make sure that when you upgraded your forum, you did it correctly.
Also, having the 'Extended Reputation Display' mod doesn't help things at all.
You might have also tried to upgrade to 3.7.1 lvl1 straight from 3.7.0
and/or you didn't run the install file.
Check for outdated templates as well (Admin Control Panel Home)
You may have to re-upload 3.7.1 and run the install file.