Don't submit art that is done in a hurry. I always take the time to reproduce the errors in my source files, it give the art its character. If I find later, that my source files were wrong, I will do it over.
When artwork is submitted, that doesn't stack up, I have a habit of replacing work at the library with better work, or removing it if it is subpar.
I have been working on the Ms. Pac Man trace myself (as noted in the vector W.I.P.) but I will happily let someone else do the work... as long as it's done in the attempt to reproduce the original, rather than imrove or correct. Unfortunately, none of the stuff we do will ever be perfect, but that is what I strive for every time I go to work on stuff that I submit to the library. (perfect to the original, that is. )