Given Mike's profuse (and unnecessary) apologies about occasional echoes, I thought you might want to know that the pitch is strange on the "Airline Seats" episode in the Career Tools cast (7/9/09). It's subtle, but certainly there: Mark and Mike's voices are deeper than they should be. I don't know the exact times, but you the issue is audible at 27:10. Maybe the audio was accidentally pitch-shifted when an edit was made?
It was really strange hearing this on a podcast, because it's usually something you hear when your cassette deck (i.e. an analog medium) is dying! Thanks for the great podcast.