Upgrading from 8.10 to 9.4, glibc update would not work using "update-manager -d". Worked OK from the command line using apt-get dist-upgrade.

Upgrading from 8.10 to 9.4:
glibc update would not work using "update-manager -d".
Worked OK from the command line using apt-get dist-upgrade.

Result:
GUI update-manager disappears with no explanation.

Expected:
GUI update-manager would go all the way through or crash with an error.

Reproducible:
Every time I tried to use "update-manager -d" to upgrade to 9.4

ProblemType: Package
Architecture: i386
Dependencies:
 libgcc1 1:4.3.3-5ubuntu4
 gcc-4.3-base 4.3.3-5ubuntu4
 findutils 4.4.0-2ubuntu4
 libc6 2.9-4ubuntu6
DistroRelease: Ubuntu 9.04
ErrorMessage: subprocess pre-installation script returned error exit status 1
Package: libc6 2.9-4ubuntu6
SourcePackage: glibc
Title: package libc6 2.9-4ubuntu6 failed to install/upgrade: subprocess pre-installation script returned error exit status 1
Uname: Linux 2.6.28-11-generic i686