Hi!

I suppose that Your advices helped. I performed those two 
steps and now i don't anymore get that error message 
during updating.

Thanks!

On Fri, 21 Nov 2008 19:13:44 -0000
  Chris Coulson <email address hidden> wrote:
> ** Description changed:
> 
>  Was updating via update manager, after new installation 
>when this error
>  occured.
>  
>  Binary package hint: system-tools-backends
>  
>  on an elitegroup AM2+ motherboard with AMD Athlon 64 X2 
>BE-2400
>  processor, 4gb of ram
>  
>  ProblemType: Package
>  Architecture: amd64
>  DistroRelease: Ubuntu 8.10
>  ErrorMessage: subprocess post-installation script 
>returned error exit status 1
>  NonfreeKernelModules: nvidia
>  Package: system-tools-backends 2.6.0-1ubuntu1.1
>  SourcePackage: system-tools-backends
>  Title: package system-tools-backends 2.6.0-1ubuntu1.1 
>failed to install/upgrade: subprocess post-installation 
>script returned error exit status 1
>  Uname: Linux 2.6.27-7-generic x86_64
>  
>  ***TEMPORARY WORKAROUND***
>  After the upgrade has failed, you will get an error 
>every time you run dpkg or apt-get saying that 
>system-tools-backends is not configured. "sudo dpkg 
>--configure -a" will not fix this. To recover, please 
>perform the following 2 steps:
>  
>  1) sudo invoke-rc.d system-tools-backends stop
>  2) sudo dpkg --configure -a
> + 
> + ***TEST CASE FOR SRU***
> + 1) With current version (2.6.0-1ubuntu1.1) of 
>system-tools-backends installed, open up 2 terminals.
> + 2) In the first terminal, type "users-admin", but 
>don't press enter to run it yet.
> + 3) In the second terminal, run "sudo apt-get install 
>--reinstall system-tools-backends".
> + 4) As soon as this line appears in the second 
>terminal, hit enter in the first terminal to run 
>users-admin: "* Stopping System Tools Backends 
>system-tools-backends"
> + 
> + The reinstall will fail. Once this has happened follow 
>the workaround
> + above to recover, then upgrade to 2.6.0-1ubuntu1.2.
> + 
> + Once upgraded, repeat steps 1 - 4, and note that the 
>reinstall never
> + fails.
> 
> -- 
> package system-tools-backends 2.6.0-1ubuntu1.1 failed to 
>install/upgrade: subprocess post-installation script 
>returned error exit status 1
> https://bugs.launchpad.net/bugs/294389
> You received this bug notification because you are a 
>direct subscriber
> of the bug.
> 
> Status in “system-tools-backends” source package in 
>Ubuntu: Triaged
> 
> Bug description:
> Was updating via update manager, after new installation 
>when this error occured.
> 
> Binary package hint: system-tools-backends
> 
> on an elitegroup AM2+ motherboard with AMD Athlon 64 X2 
>BE-2400 processor, 4gb of ram
> 
> ProblemType: Package
> Architecture: amd64
> DistroRelease: Ubuntu 8.10
> ErrorMessage: subprocess post-installation script 
>returned error exit status 1
> NonfreeKernelModules: nvidia
> Package: system-tools-backends 2.6.0-1ubuntu1.1
> SourcePackage: system-tools-backends
> Title: package system-tools-backends 2.6.0-1ubuntu1.1 
>failed to install/upgrade: subprocess post-installation 
>script returned error exit status 1
> Uname: Linux 2.6.27-7-generic x86_64
> 
> ***TEMPORARY WORKAROUND***
> After the upgrade has failed, you will get an error 
>every time you run dpkg or apt-get saying that 
>system-tools-backends is not configured. "sudo dpkg 
>--configure -a" will not fix this. To recover, please 
>perform the following 2 steps:
> 
> 1) sudo invoke-rc.d system-tools-backends stop
> 2) sudo dpkg --configure -a
> 
> ***TEST CASE FOR SRU***
> 1) With current version (2.6.0-1ubuntu1.1) of 
>system-tools-backends installed, open up 2 terminals.
> 2) In the first terminal, type "users-admin", but don't 
>press enter to run it yet.
> 3) In the second terminal, run "sudo apt-get install 
>--reinstall system-tools-backends".
> 4) As soon as this line appears in the second terminal, 
>hit enter in the first terminal to run users-admin: "* 
>Stopping System Tools Backends system-tools-backends"
> 
> The reinstall will fail. Once this has happened follow 
>the workaround above to recover, then upgrade to 
>2.6.0-1ubuntu1.2.
> 
> Once upgraded, repeat steps 1 - 4, and note that the 
>reinstall never fails.