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How does “Reputation” work?
Reputation discrepancy
Bug with reputation display

Yesterday, my reputation was 1207 and Stack Overflow is showing 1101. Why?

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marked as duplicate by Time Traveling Bobby, kiamlaluno, John, ChrisF, Nick Craver Nov 27 '11 at 12:32

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

    
Because of a reputation recalc or 53 downvotes. –  muntoo Nov 24 '11 at 5:53
    
you can see on left bottom corner my reputation is 1207 and on right top corner its 1101. why? –  Parag Bafna Nov 24 '11 at 5:55
    
why i got downvote? you can see in picture left bottom corner my reputation is 1207 and on right top corner its 1101. –  Parag Bafna Nov 24 '11 at 5:55
    
I don't know why you got 53 downvotes, but you must have done something really, really bad. (Such as insulting Jon Skeet or unicorns.) –  muntoo Nov 24 '11 at 5:57
    
but my profile is not showing any downvotes. –  Parag Bafna Nov 24 '11 at 5:58
    
Well, either you downvoted 106 times, or there was a rep recalc. –  muntoo Nov 24 '11 at 6:02
4  
You earned Mortarboard yesterday and yet your reputation graph shows only 135. Since you had to exceed 200 to get the badge, it looks like ten votes or so were rescinded. It could be due either to a deleted post or voting irregularities. –  Rick Sladkey Nov 24 '11 at 6:49
    
I do wonder if some algorithm is removing votes it finds questionable, without any oversight. That doesn't seem like a good design to me. –  Mr.Wizard Nov 24 '11 at 9:01

2 Answers 2

up vote 3 down vote accepted

The most logical reason I can think of, is that the reputation in the Account section is cached (probably updated each day). The account section show the rep of each site. Recalculating this each moment could be performance madness.

As some have already said in comments, the sudden "loss" of reputation is almost always from deleted questions or fraud detection.

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See Reputation recalculation? and a bunch of other results if you search for reputation recalculation.

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