Preview for rotation of objects with negative scale is innacurate.

If an object's scale (in the animation editor) is set to any negative number (which might be used to flip a sprite) and then a rotation of ex. 10° is given to that object, the preview window in Bread will show the object rotated as if -10° was input.

Checking in Megamix, the object will be rotated 10°, not -10° as seen in Bread .