upon creating another sprite with a physics behavior, the runtime crashes for no apparent reason.
with some expimentation ive found that removing the "solid" checkbox on the wooden object fixes the bug and im able to create one more object with physics behavior without a crash. there seems to be a link with the solid checkbox and physics behavior????? try it and see; create a sprite and give it a new physics behavior. run it and BOOM crash. uncheck the solid checkbox on the wooden object and for some reason the crash disappears. this is a serious bug in the physics engine and/or behavior system and should be addressed asap.