Private messaging issue after 3.8.1 upgrade
 

Hello all!
I have a problem I can't seem to work out and wanted to see if the experts might lend some insight :D

Ever since I upgraded my site to 3.8.1, its impossible for any user to select multiple private messages (by clicking the checkbox next to TODAY, LAST WEEK, OLDER, etc). When you select one of those boxes it would usually select every message under it. Now it doesn't do that. Makes it impossible to delete multiple private messages at once. You literally have to select each and every one now... one at a time.

Anyone else seen this issue? I'm stumped and users are unhappy so I'm curious if I might find some suggestions here. Thanks much!