Considering that Carl Barks drew more than 50,000 comic book panels in his life it should come as no surprise that he made a few mistakes in his drawings. From time to time he made both small and innocent - as well as large and grave - errors in his duck stories. Some were of a more technical nature, while others were factual, but he can easily be excused because his production was so overwhelming.
This page, however, shows a few panels of another, more general and amusing kind, namely examples where Barks was not as attentive as he should have been and where he should have caught and corrected his mistakes. But the questionable panels were published for us all to see, and you are hereby invited to try to find what is wrong in the selected panels. Barks did not catch the errors and you may also have a hard time figuring them out. Don't worry if you cannot find them; you are given the solutions...