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here's an example, if you expand the comments there is a '1' next to one of them...

http://stackoverflow.com/questions/3294829/java-reading-json-null/3294891#3294891

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up vote 1 down vote accepted

It means it has 1 upvote; you can vote on comments by hovering the mouse on the left of them.

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5  
Try it on this one – juan Jul 21 '10 at 15:38
    
ah -- do you get reputation for that? – hvgotcodes Jul 21 '10 at 15:39
    
@hvgotcodes: No, see meta.stackexchange.com/questions/17364/…. – mmyers Jul 21 '10 at 15:43
1  
Comment upvote whoring!!! =P – devinb Jul 21 '10 at 15:46
2  
@devinb, I already have everything I can get from that :) – juan Jul 21 '10 at 15:48

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