[Hoary] ubuntu-desktop upgradable - Update Manager not showing

[Ari Torhamo]

Hi,

I just opened the Update Manager to check if there are any updates
available for my Ubuntu installation. Update Manager said that my system
is up-to-date. Then I opened Synaptic to see what does it say and it
showed one upgradable package, namely ubuntu-desktop. Is there a reason
why an upgradable package was shown in one, but not in the other?

Regards,

Ari