photonstorm/phaser — pull request #1438 by paul-reilly (2014-12-09 23:54:31+00:00)
Title: Fixed Tiled JSON parsing....

I had an issue with a Tiled map tileset failing to import because of unsupported per tile collision data, which lead to a crash. Another forum user had a similar issue. This fixes it for me, although you might be aware of cases where this is a bad idea.