Ubuntu 9.10 cant find root device after Nvidia install

Couldn't find were to add the Bug report so i write it here... hope it's useful any way.

After installing 9.10 beta everything works fine, updating works fine.
Then i install the proprietary Nvidia driver, the recommended one out of three. (newest one, higest ver. number i think)

After the computer restart it cant find root device..

From screen:

Gave up waiting for root device. Common problems:
- Boot args (cat /proc/cmdline)
  - Check rootdelay=(did the system wait long enough?)
  - Check root= (did the system wait for the right device?)
-Missing modules (cat /proc/modules; ls /dev)

Alert /dev/disk/by-uuid/xxxxx-xxx-xx-xxx dones not exist
Dropping to a shell!

(initramfs)

I have tryed reinstall but same thing happens again then installing Nvidia driver

New thing happend during writing this... after rebooting a couple of times i tryed an older Kernel from GRUB,
It dident work, But i did come to Terminal loggin prmomt and the screen was flickering.
Reboted and 9.10 started up again, (but the Nvidia proprietary driver Was not installed)

Hope it does any sens.

Best Regards
Johan Stenlund
Happy ubuntu user! ;O)