The following C-code fails in ubuntu 10.10, but not in 10.04
This proves that It is a driver issue with the new kernel or less
likely a libc issue.
#define _GNU_SOURCE
#include <fcntl.h>
#include <stdio.h>
int main (int argc, char **argv)
{
int fd;
fd = open("/dev/ttyUSB0", O_RDWR);
printf("fd has value %i\n", fd);
}