There is a new modification that allows you to give thanks to other posters for their helpfull or kind posts. This option is not allowable to you underneath your own posts. All you have to do is click Thank for this post at the bottom of the posters post.
You can view your own or others post thanks given and recieved by clicking the Post Thanks arrow under your or someone elses user's name.
You can aslo view your own or others post thanks under your's or thier's profile by click the Post Thanks tab.