I recently released a new version of mahotas, my computer vision package. It was version 1.0.1, which was quickly followed by 1.0.2.
Thus, 1.0.2 was necessary. I released 1.0.2 about an hour after I was alerted to the errors.
This is why I develop my scientific code as open source. (1) Other people catch your mistakes and fix them for you (and the whole community wins)! (2) because the code was public, I felt a great urge to fix the mistakes very fast. I even added tests to make sure they would not happen again. I am harnessing public pressure for good.