I've just purchased a Panasonic DVD recorder that can record onto DVD-RAM or DVD-R. I'm aware of the compatibility issues surrounding DVD-RAM but I thought if I recorded onto DVD-R I wouldn't have a problem. However, when I try to watch stuff I've recorded (on DVD-R) on other vendors machines they don't seem to be able to read the disks. The only thing I could think of is that the Panasonic allows different recording times e.g. SP, LP, EP. Should I ony record at a particular "speed" to ensure compatibility or is there some other problem. I've tried watching on a Sony machine, Yamaha and cheap MICO none of them work. Any advice would be appreciated.