Level 51 Arena Emblems
When the update happened, all of my Level 51 emblems were rated 2 stars. All of my Level 50 emblems were also rated 2 stars.
After the update, the Level 51 emblems I won from the Arena GPM are all 3 stars so I will be able to enchant them more times.
Hopefully Rovio will fix it so that all Level 51 emblems will be 3 stars, otherwise I will have to collect a whole new set of emblems to get them all 3 stars.