Hi, I downloaded the Ubuntu 9.10 ISO from BitTorrent, and ran unetbootin to prepare my 2GB thumb drive. After rebooting my computer, I started the installation, I got a Input/Output error during the installation. I run

cd /cdrom && md5sum -c md5.txt
to check for problems and find filesystem.squashfs is corrupt. Is there another way to install ubuntu from USB?, and is there a way to make sure my thumb drive is still working in peak condition?