I have a Panasonic DVD recorder which accepts DVD/R/RW disks and removable RAM disks. I use the RAM disks nearly 100% of the time with no problems. Before disposing of my old video recorder I tranfered all my old recordings onto DVD/RW disks which play OK in the Panasonic machine. They also play in my Aiwa DVD player and on the computer ... so no problems. Last night a friend asked me to record a program off SKY which meant that I had to use a DVD/RW as opposed to the RAM disk ... it recorded OK and plays back on the Panasonic machine OK but it is not recognized by either the Aiwa machine or the computer. I have taken a copy on the computer using Nero but that still will only play on the Panasonic machine. Why should disks with material taken from old video tape be OK but not a program recorded direct from the TV? I also note that when I insert the disk into the computer the annotation of the drive in explorer changes from DVD-Ram Drive (K) to CD Drive (K).