(Feisty) Can't start X11 with nvidia driver: linux-restricted-modules don't update to 2.6.20.10.6

Since the current (2007-03-13) Feisty update I can't start X11 with the nvidia driver anymore, because the update manager didn't select the linux-restricted-modules 2.6.20.10.6 for installation. I couldn't select them manually either, even though they showed up in the update manager.

[code]$ uname -r
2.6.20-10-generic[/code]

[code]$ sudo apt-get install nvidia-glx
...
The following packages were automatically installed and are no longer required:
  libtwolame0 linux-headers-2.6.20-9 libqt4-core libqt4-gui
  linux-headers-2.6.20-9-generic libjsw2
Use 'apt-get autoremove' to remove them.
The following packages will be installed:
  linux-image-2.6.20-9-386 linux-restricted-modules-2.6.20-9-386
...:
  linux-doc-2.6.20 linux-source-2.6.20 avm-fritz-firmware-2.6.20-9
  nvidia-kernel-source
The following NEW packages will be installed:
  linux-image-2.6.20-9-386 linux-restricted-modules-2.6.20-9-386 nvidia-glx
...
...
...
Would you like to continue [Y/n]?[/code]

The following bug appears in Feisty very often, but in the past I could always solve the problem by removing and installing nvidia-glx.

https://launchpad.net/ubuntu/+source/linux-restricted-modules-2.6.17/+bug/84630