I saw that as well. It was a bizarre reaction to just the mention of her name as like you say the conversation wasnt anything contentious.A couple of days ago a poster on the Celebrity Goss thread mentioned JK, I can't even remember the context but it was something innocuous and there was a lonely angry face reaction.
I felt like tagging the angry face and asking wtf the problem was or inviting her over here to see what kind of 'dolls' she's really protecting.