This is cool, and reminds me of a disaster I once wrought upon myself: Maybe 6 years ago I used TextWrangler to find and replace against a folder. It was only

This is cool, and reminds me of a disaster I once wrought upon myself: Maybe 6 years ago I used TextWrangler to find and replace against a folder. It was only a few characters being changed but there were loads of instances of them. In my PHP code it was no biggie but I accidentally overwrote parts of a Flash FLA (hundreds of instances in the binary) and made a massive piece of a project for my biggest client at the time worthless. Totally avoidable, lesson learned!