Yeah, Im getting the same thing. There almost seems to be more of a harshness to me. I recorded 3 different patches with the same settings and the only thing that changed was the firmware. I was disappointed in the uberschall tone the whole time Ive had the axe until 1.03 and it finally really started getting the bogner tone and then it was lost in 1.04. There's almost a hum in the background when Im playing, but it clamps off with the gate when Im not. I will say, I think I like the light crunch tones a bit better in 1.04. All my high gain tones sound more harsh, have a little less clarity, and the attack seems harder to me. Im gonna play around with it for a bit, but I'm pretty sure Im going back to 1.03