Okay, this one's weird ...
I'm using a DARU3 Darter Ultra. I was using Mint 7 (based on Jaunty), and it worked fine.
I've tried out both Mint 8 and Karmic now. On the LiveCDs, they recognize my SD card reader and USB flash drive; these things automatically mount as soon as I plug them in. Once the distro's installed to my hard drive, however, neither work. (The sound also cuts out after a little while, and I have no idea why.)
What information is needed to troubleshoot this, and/or what can I do to solve it?