I haven't used my MSO1074Z much since I upgraded from my 1054Z, but today I realized there is a very serious issue, the vertical scale knob doesn't work! Instead, it operates like a second vertical position knob, moving the waveform up/down instead of changing the scale. I'm on firmware version 4.04.SP1. I decided to look and see if there was a more recent firmware update, and when I filled out the form on the rigol site, they sent me 4.03.SP2! I don't recall this being an issue when I first unboxed it, I feel like it probably started when I upgraded to 4.04.SP1. Has anybody else experienced this issue? Does anybody know why they're sending out 4.03.SP2 as the latest firmware, when I know I downloaded 4.04.SP1 from their site a few month back? Is there any way to fix it? Not being able to set my vertical scale is pretty awful, especially now that I've sold my 1054, and this is my only scope