Bug#619251: netinstall amd64 leads to grub rescue

[joz]

package: grub2

Hi,
I want to install squeeze per netinstall, booting from USB flash drive 
(on a lenovo thinkpad edge 11, amd64).

Put this iso file on the flash drive : 
http://cdimage.debian.org/debian-cd/6.0.1/amd64/iso-cd/debian-6.0.1a-amd64-netinst.iso
The machine booted on the drive but right after "Welcome to grub!" it 
drops to the grub rescue prompt.

greetings
Joz