As i understand it, attr should be setting and getting attribute on DOM elements, but this doesn't seem to be 100% true anymore with 1.6+. While I can set the attribute "disabled" on any element, trying to get that attribute returns undefined unless that element is a input. I would suspect this to be true of similar attributes that were changed in favor of prop. In this case, we are not trying to set an javascript property, rather a simple attribute on the element. I would think that i ought to be able to set/get any attribute regardless of name. This bug makes upgrading to 1.6 impossible for my company without MUCH pain.