Of course, for IE users, it shouldn't be a problem.
To be honest, as a use of Firefox, it's quite shocking since this kind of vulnerability is tough to be recognized by the users. I linked Secunia's vulnerability reports at times but the info is pretty useless for this type of vulnerability. Also, some of us use browsers other than IE since IE is too tied to the OS. However, this kind of recognition is proven wrong when the OS "introduces" the same vulnerability with IE like in this case.
I leave the readers whether they take this as yet another anti-MS message or not (to be honest, I'm rather tired of "political" discussions simply because their repetitive nature) but, practically, as users, we have to deal with the outcome of any kind of vulnerability issues to protect our "assets", no matter how it managed to come into our systems.