libnl upgrade uninstalls network-manager

[George Lee]

Hello,

When I run apt-get upgrade, it holds back on upgrading three libnl-3 
packages. When I specified to upgrade them, the upgrade removed 
network-manager and network-manager-gnome, stopping my Internet 
connection.

This is with the upgrade of libnl packages to the 3.2.21-1ubuntu4.1 
version.

Does anybody know why this happens? How do I upgrade the packages 
without removing network-manager and network-manager-gnome, or is this a 
bug?

Thank you.

- George