Just got off of the phone with Yaesu Tech support, and they said they have never run into this and never noticed the problem.
They said it doesn't make sense. You need the band scope to tune the hard to hear signals, but if your tuning it and cant hear it, how do you know your not missing what your looking for. They are looking into it, and are going to get back to me.
Also... The 1.5 firmware was released, but only as an internal release for newly shipped equipment. It doesn't upgrade anything the user can see, it was a minor update for something internal.