I don't know what exactly is broken, but my game activates lot of events based if you overlap certain invisible objects. Everything is working fine with r147. After I updated I realized that r148 is activating some of these events at the beginning of the layout and there's no logical explanation other than the recent improvements to the collision in r148. I reverted back to r147 so I can continue working with my big game.
Example: If object A is overlapping with object B then play once sound boom.
r147 will play sound boom when object A overlaps object B
r148 will play sound boom at a random situation. Any action in the game can trigger sound boom, even if you just start the level it might trigger it.
This happens in Chrome and Nodewebkit preview.
This was just to inform that there might be some problems and will hopefully help if there is any further problems.