Found this in the FAQ:
Location: Doha, Qatar
How to GIVE CHEESES (Thumbs Up/Down) . . .
« on: July 17, 2008, 04:57:03 PM »
If you are logged in, then to the left of a post, below the posters' name, there is a small section called Cheeses: 3, this is a counter for how many Thumbs Up +1 less Down -1, that person has received, a rough measure of their credibility.
After 5 posts, Users can give other Users (not themselves), a Thumbs Up or Down at any time on any post by just clicking on the button below the Cheeses: 3 counter.
There is no financial reward, just an Attaboy/Kudo's sytem. So if you feel someone has been helpful, give them a thumbs up, if you believe they have been distrupting, give them a thumbs down.
« Last Edit: July 03, 2010, 09:41:02 AM by Webmaster »
So the answer appears to be I need 5 posts to see the thumbs up button. Well this is 5 so will take a look.