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Yesterday I logout my account with 308 Reputation.

This morning I downvoted an answer from the below question mysql combine columns of multiple tables. So I got -1 reputation for down vote(307). But Now I have only 298 reputation.

Note: The downvoted answer is deleted from that post.

I have searched for my reputation history -10 votes not mentioned.

Can I know what happened?

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Have you checked the "show removed posts" option at the bottom of your /reputation tab? – ChrisF Dec 29 '12 at 12:00
Did you check the show removed posts box at the bottom of the page? Most likely a question was deleted and an answer with one upvote went with it. – Martijn Pieters Dec 29 '12 at 12:00
Ya. It already checked. Down voted question deleted from that question. – Vazhga Valamudan Dec 29 '12 at 12:03
It could also be someone gave you an upvote, then undid that upvote within the grace period. The rep counter at the top of the page doesn't update automatically on such events (only a page reload does). At that moment your rep counter still shows 308 instead of 298. – Martijn Pieters Dec 29 '12 at 12:04
As a consolation prize, you got a 100 rep association bonus for coming here. So now you have 398 rep. Problem solved? :-) – Bo Persson Dec 29 '12 at 12:09
@MartijnPieters got 308 reputation yesterday itself. – Vazhga Valamudan Dec 29 '12 at 12:11
@BoPersson I agree with you. :-) – Vazhga Valamudan Dec 29 '12 at 12:13
I don't see anything abnormal in your history. The 1 rep for the down vote was refunded after the post was deleted, you gained the association bonus .. it adds up. – Tim Post Dec 29 '12 at 12:49
Thanks for your efforts folks. :) – Vazhga Valamudan Dec 29 '12 at 12:51
up vote 1 down vote accepted

SE does some automated detecting and clean-up for suspicious voting patterns, you may have been affected by such a clean-up.

Vote Fraud and You

More Voting Anomalies

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