We are developing a browser-based software product in our company as well.
I also stumbled over the theory that “a browser should just be a browser” and “standard HTML ought to be enough” but in practice, the opposite is the case. IE development is pain in the ass. However, also the other browsers (mainly Chrome/FF/Safari) need their special treatment as well.
Platform-related issues are rare, that’s true. But in this case, the feature is basically dead for a large portion of Linux users. At least for a couple of months. I’d say this should be fixed pretty soon before people start dropping this great feature from their products.
Just my 2 cents …