My LUG member has come up with this problem. He is a suse user.
"I have a customer with a laptop from Linuxemporium, with ubuntu pre-installed.
I think it is gutsy, but will have to confirm that.
She is using a wireless network (WPA-PSK), with broadband connection.
The problem is with online updates. When logged in, a message informing of new
updates is shown. If accepted, the list of headers downloads correctly. But,
on clicking install, nothing happens.
If I try running apt-get update / upgrade, update works fine, but upgrade
reports that resource [ESSID xxxx} could not be accessed.
However, if I run apt-get from an SSH login, or a virtual terminal, everything
work fine.
Any ideas what could be wrong - is there a configuration file for the updater
that could be wrong."
I thought this was probably a glitch of some sort when updating and a
file corrupted [after all 50%+ problems are wireless and updating] and
suggested that he reinstalled. I have had a problem on 7.10 where the
Update manager stopped working but manually updating through aptitude
was fine.