On 11 Jun 2008, at 22:44, Kim Gammelgård wrote: > I have just had the same issue at a MUG-meeting yesterday on > different computers. I would say that 10.5.3 is the culprit here. > >> > On Jun 11, 2008, at 10:16 AM, Dr. Trevor J. Hutley wrote: >> I am trying to write a CD-R on my 2003 aluminium G4 Powerbook >> (UJ-816 DVD drive) and got this message: >> >> the disk can't be burned, because the device failed to >> calibrate the laser power level for this medium Kim - indeed, I am using 10.5.3, but I have a partition on my 160 GB hard disk that has 10.5 (only) on it, so I restarted from this partition, to burn the CD from there, and got the same message..... So that seems conclusive that it is not the OS X version that is the source of the problem. regards, Trevor