I have a new SanDisk ImageMate CF Model SDDR-91. It works fine with Windows XP. It worked on my Aluminum PB G4 running 10.3.4 one time. Then my PowerBook HD died, I sent it to Apple and when it came back I reloaded the OS, and it hasn't worked since - yet still works on my Windows XP box.
I have tried connected to a hub, my Apple Display, and directly to the PowerBook. It just doesn't work, nothing happens when I connect it.
Any ideas on what I should try next? According to SanDisk, no software is required. It should just work...