I like Pixelmator as a lightweight alternative to Photoshop. It’s perfect for a quick resize on an iPhone photo or Tumblr snippet before uploading or sending somewhere else. Yet I greatly dislike the Lion preferred auto save/versioning that comes with Pixelmator out of the box. It’s unnecessary and adds bloat to my throwaway, multi MB files.
After a few google searches, there’s actually a really simple solution buried in the support forums. Just one line in the console. Scroll to the thread buttom.