Awesome! I am using this.
I am actually recreated BrowserQuest (http://browserquest.mozilla.org/ <--- Original). They went open source and they are HTML5/JS so I decided I'd remake it for Construct 2 and release it!
Problem though. I exported the map to a .tmx file, and copied the string. Everything works! Or well, did.. Now it freezes my construct 2 client, crashes it, and it takes forever to load in the browser too.
The tileset is 320x1568 with tiles of 16x16.
It divided itself into over 2000 tiles! (Using import sprite sheet)
It worked at first, then it started doing the above, lagging, crashing, etc. I can't even open up the animations anymore either, double clicking that specific tileset locks up the client.