I installed the fix from the IDA guy (totally counting on his "fame"
) some days ago on various PC, and from my experience it worked and haven't negatively affected nothing. Since Microsoft is taking too much time to patch this (as usual), I think it's highly recommended to apply this patch.
One of the nasty thing with this kind of exploit, is that you don't even need to open/view the file if, for example, you are running Google Desktop. When Google crawler hit the file, it will try to render it himself to get a proper thumbnail!