Currently in the main R2P window the person with a green + icon represents adding a friend to your friends list. In a chat box, that same icon indicates inviting a friend into the chat.
This is a little confusing. There's no guarantee that everyone in the chat will have everyone else on their friends list, so there should be functionality to add people to your friends list from the chat window, and at the same time the "invite to chat" button needs to be differentiated so it's not quite so confusing. 
