|Quoting Aero145 (Reply 1):|
And what's wrong with 1024x683, as you put 1024x676...
Why bring it to the point instead of asking a question where the answer is pretty clear.
The answer would be: Regardless of sharpening or any other issues with the uploaded pictures there is a high chance that they get kicked back for being outside the size limits. The minimum height for 1024 wide pictures is 683.
The size limits can be read at
Hope this helps to answer the questions.