This has been a tough one to track down as we are getting random problems with all our comboboxes. What happens is when the value is '' the change event sends in 'Fiddle.Model-1' instead of ''. This code worked just fine in 5.0.X and now is broken with 5.1.0. Since our app uses a lot of comboboxes in properties, hopefully there is a workaround for this.

Here is a Fiddle showing what is going on. Just watch the Chrome console to see what happens. All other values including null work as expected.


http://ift.tt/1CFiXuH