|Those thumbs are for the reputation system. Although I've only been on this forum for a month and a half, I haven't seen much use out of them. Reputation systems setup like this don't have much merit because anyone can +1 or -1 a post for any reason, including making it personal and totally unrelated to the post itself.|
For your second question, are you talking about the Message List? http://www.computing.net/cgi-bin/my...
Each thread (discussion) you participate in gets added to the Message List. When a reply is made in that thread, the title becomes bold to inform you to reread the discussion. If you no longer want to track that thread, you can remove it from your list. It's basically a "subscribe to topic" feature found on other forums and is set to subscribe to all topics you participate in automatically.
Apologies if I don't respond to your reply immediately. I don't check this site daily.