Pers'nally, I don't much care. The podcasts are exceedingly well-made for something that is literally given away for free. Sure, if I'd paid fifteen bucks for a CD and found audio editing artifacts in it, I'd be quite irritated and might ask for a refund, but when something is done out of sheer love and enthusiasm, I have a hard time being bothered by minor errors, especially when the content-makers are uniformly polite and cheerful about admitting to goofs and working to fix them. When I notice an editing artifact, I mention it, and that's that. Then they know, and if they decide to take the time to go back and touch up the bad spot, then kudos to them.
Besides, it's like a thumbprint in a handmade bowl; it lets you know someone made it, personally, and not as part of something too large and faceless to be understood.