This one is pretty serious. Hard to say what led me to this point (read, no clear rep steps). I built a schematic, created a board, and soon enough created a GND ground fill. When I hit the "Rebuild CopperArea" button, nothing happens, save this JavaScript error:
Uncaught TypeError: Cannot read property 'x' of undefined
That's in editorPCB.min.js, on line 6 ...though what is line 6 in minified code? :-)
Needless to say, I am pretty much stuck at this point.
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
