Don't get me wrong, I'm not complaining about the vocals. Just one particular note that disagrees with my hearing. I've never noticed it in person, nor on HCTB so maybe it comes from the process of recording Meat's live vocals or maybe it's just me.
The bit that immediately comes to mind is Paradise on the MSO DVD, just after the Adam Sandler impression when Meat does the 'It was long ago and far away...' bit in a higher pitch.