It generates weird errors in user pages when you try to activate the badges beside members name. I'm at work right now so I'll get into details as soon as I get a break.
EDIT:
This is the problem I'm having. It appears on any user page, in activities, when you select the options #1, #5, #6, #7 on plugin control panel. Selecting only option #1 generates no errors.
Notice: Undefined index: who in /.../qa-include/qa-app-format.php(1448) : eval()'d code on line 186