derekb
Also changing the value to 0 on my default did not work - it reverted back to normal...
If you edit grub.conf using
nano -w /boot/grub/grub.conf
& change it to read
default=0
timeout=5
& then save it, the new value should be retained.
Unless of course you select a different kernel from the boot up splash screen, because when you select the third kernel listed, then the value will be permanently changed to
default=2
which is possibly what happened in your case.