Give the gift of Drupal. All merchandise is 50% off through 2016.
Just performed the 5.x.1.15 update and the static widget showing the average vote is only showing 5 blank stars regardless of whether any votes have been cast on a node.
If i revert to the 5.x.1.13 version of the fivestar_static function it works fine.
I'll take a closer look over the weekend and if i get a fix i'll post a patch.