This can be found along the top of every post next to the quote :
If users have been helpful with their posts please use this to not only say thank you but to rate the topics for future use when people are looking for the best topic with regards to a subject.
You will probably have to clear your browsers image cache for these to appear, CRTL and F5 usually does this in most browsers. If not, the option will be in the options / settings.
Enjoy!
Ross.
