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A flagged question/answer that has been down voted is shown as in the following screenshot.
The minus sign is in the middle of the grey block, and the number is partially shown outside that grey block; it seems the number is also truncated.
Posting this as an answer because of a screenshot alone.
This is also a problem in the Answer activity page on a user's profile page. Any negative number will cause the content to overflow;
This appears to be fixed (no idea when, though).