I bought a Pioneer 563A universal player last week and found that it won't play certain DVD-A disks properly. I won't get into the details, there's plenty on the net. I did read a thread somewhere where someone mentioned that the players manufactured in Feb-2004 had the update. Mine was manufactured in Nov-2003 and it would not play my Steely Dan - Gaucho DVD-A. I went back to Best Buy and found a stack of Feb units so I exchanged it. It plays Gaucho without a problem. For those of you that don't have the option of exchanging the unit, I heard that you can send it into Pioneer and they will do the firmware update. Unfortunately it seems that this cannot be done with just a software update on a DVD.