I forget whether the workaround was done for Firefox or Chrome...I remember hitting it in one or the other, and putting in the workaround for both.

On a related note, transferable objects are handled a bit differently between IE, FF, and Chrome. Some are a bit stricter than others.

That's not surprising, but annoying. Please do file bugs as needed; the spec is generally pretty clear about how things should work here, so if browsers don't agree one of them is just buggy.