I've noticed that if I use a persistent image file and for some reason it gets corrupted (powering off abnormally) that I'll get a bunch of filesystem errors in dmesg. I can fix it by booting with the "noimage" cheat code, like "knoppix64 2 noimage" and then run "fsck.ext2 /mnt-system/KNOPPIX/knoppix-data.img" and then "sudo reboot".
It'd be really nice if there were an automatic check of the ext2 image when knoppix boots. It would also let you know if errors have crept into your filesystem since knoppix still works but you see weird messages like "unable to write /etc/fstab".
Handheld Cordless Car Vacuum: 14000PA High Power, Lightweight, Black
$36.79
KLIM Cool Laptop Cooler Fan, Portable Quiet Cooling Vacuum w/Display - BLUE LED
$15.95
Electric Vacuum Cleaner Air Duster Suction High Pressure for Computer Car Home
$10.87
Electric Vacuum Cleaner Air Duster Suction High Pressure for Computer Car Home
$9.97
Electric Mini Air Duster Blower Vacuum Cleaner for PC Computer Laptop Dust
$30.95
Mini Computer Vacuum USB Keyboard Cleaner PC Laptop Brush Dust Cleaning Kit US
$13.68
Electric Mini Cordless Air Duster Blower Vacuum Cleaner for Computer/CarCleaning
$17.58
Compressed Air Duster with Air Blower 100000RPM Vacuum Cleaner and Air Duster
$38.99
2-In-1 Air Duster & Vacuum 60000 RPM Rechargeable Auto Computer Keyboard USB
$26.95
Portable Cordless Hand Held Vacuum Cleaner Wet Dry Car Auto Home Duster w/ Bag
$24.98