New this build: more physics engine updates and fixes, 'set pixel rounding' system action, and some other bugs squashed.
More physics engine updates
The updated asm.js physics should now be working better, especially with r196.2's bug fixes, and so is now the new default physics engine. For compatibility reasons we've found that we must actually retain box2dweb, contrary to our earlier plans to remove it entirely. So box2dweb is still there, but it is not recommended, and will not be maintained any further from its current state.