Is there a known backward compatibility problem with smaller capacity (<256MB) CompactFlash cards and newer MacOS? I have a PowerBook G4 running Tiger MacOS X 10.4.11. I keep a 32GB CompactFlash card in the PCMCIA slot as an extra hard drive which works very nicely. Today I was cleaning my office and came across several 80MB, 64MB, 256MB CompactFlash card which I used to work. I tested them and they still work fine in the cameras I used to use them with. All the cards, from various manufacturers including SanDisk, work fine in my older PowerBook G3 running Tiger MacOS X 10.4.11. However, only the 256MB card works in my PowerBook G4 and Tiger. I also tried using a USB card reader with the PowerBook G4 but that also didn't get the smaller cards to work. Ideas?