Stable releases have been tested and used in our Beta channel which helps eliminate the chance you'll run into bugs. If you're not sure which releases to use, you should probably use Stable releases.
Patch release
Stable release: 3D editor; 3D bullets; additional Event Sheet Views & lots more
Another patch release
Stable release: 3D model; dynamic sampling; new fullscreen modes & loads more
Stable patch
New stable release: Physics collision filtering; UI improvements; new blend modes & lots more
Stable patch for some regressions