Thanks! I never thought to even look there. I guess that is a user specific setting then?
Yep, and it defaults to being "Off" which means at some point, you had to manually check that box.
The numbers are the "Thread Scores" which is just a numeric representation of the "popularity" of the thread. The formula is actually semi-complicated, taking into account each post individually weighted on it's age and summing the total "value" of the thread. The number that shows is just the "value" of it, so that you can see exactly how popular a thread is, according to the site.
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It's all in the reflexes.