This might be a Bootstrap bug, but it showed up when I upgraded to jQuery 2.0.0 from 1.9.0. I'm filing a bug with Bootstrap as well.

http://jsfiddle.net/aEDKF/7/

I'm getting some weird behaviour when I set data properties by passing in an object instead of setting each data property individually. In my case the weirdness shows up when I'm toggling some button text using Bootstrap.

I set data properties on two buttons simultaneously:

$("#a, #b").data({"type": "foo"})

And then I let Bootstrap reset the button text on both buttons. When I then go to change one button individually it changes the other button even though I'm specifically getting the button by ID.

I don't see this behaviour when I set the data property using key/value instead of an object:

$("#a, #b").data("type", "foo")

In my jsFiddle I have both methods so you can test both of them. The 'object' method is commented out to start.

I don't see this behaviour in jQuery 1.9.x (Edge), just in the 2.0 branch.