One of the biggest problems on forums as you may know is 'post boosting'. There are users who LOVE to say 'thanks' when ever they can. How can it hurt? Their post count goes up, they have nothing to loose.
There are also users who really like to express their thanks to post but don't like posting a post that looks like they're post boosting.
Then comes the moderators/admins who have to delete people's thank you's so a thread can look readable without the thank you's thrown around.
Finally comes the posters of these useful posts. They have no idea how many people really like their post's if only some people did say 'thank's'.
Well what I have added to the forum will help us all

At the bottom of every users post you will see a little button like this

when you click this it places your username in a box right under the post saying that you have said thanks' for the post. Also this works for all users so you can see everyone else who has clicked thanks because they found the post useful or funny etc.
Hope you like it guys

If you like a post then click