Comment 1 for bug 191004

I have a similar problem.

've been trying to upgrade my kubuntu box from feisty to gutsy this evening. The upgrade manager says "could not verify the integrity of the upgrade manager" and the exits. I went into Konsole to take a look. I did

sudo apt-get clean
sudo apt-get autoclean
sudo apt-get update

whicn produced this

Get:1 http://security.ubuntu.com feisty-security Release.gpg [191B]
Ign http://security.ubuntu.com feisty-security/main Translation-en_US
Get:2 http://us.archive.ubuntu.com feisty Release.gpg [191B]
Ign http://us.archive.ubuntu.com feisty/main Translation-en_US
Ign http://security.ubuntu.com feisty-security/restricted Translation-en_US
Ign http://security.ubuntu.com feisty-security/universe Translation-en_US
Ign http://security.ubuntu.com feisty-security/multiverse Translation-en_US
Get:3 http://security.ubuntu.com feisty-security Release [50.9kB]
Ign http://us.archive.ubuntu.com feisty/restricted Translation-en_US
Ign http://us.archive.ubuntu.com feisty/universe Translation-en_US
Ign http://us.archive.ubuntu.com feisty/multiverse Translation-en_US
Get:4 http://us.archive.ubuntu.com feisty-updates Release.gpg [191B]
Ign http://us.archive.ubuntu.com feisty-updates/main Translation-en_US
Ign http://us.archive.ubuntu.com feisty-updates/restricted Translation-en_US
Ign http://us.archive.ubuntu.com feisty-updates/universe Translation-en_US
Ign http://us.archive.ubuntu.com feisty-updates/multiverse Translation-en_US
Hit http://us.archive.ubuntu.com feisty Release
Hit http://us.archive.ubuntu.com feisty-updates Release
Get:5 http://us.archive.ubuntu.com feisty Release [57.2kB]
Ign http://security.ubuntu.com feisty-security Release
Get:6 http://security.ubuntu.com feisty-security/main Packages [121kB]
Ign http://us.archive.ubuntu.com feisty Release
Get:7 http://us.archive.ubuntu.com feisty-updates Release [50.9kB]
Get:8 http://security.ubuntu.com feisty-security/restricted Packages [6341B]
Get:9 http://security.ubuntu.com feisty-security/universe Packages [79.5kB]
Ign http://us.archive.ubuntu.com feisty-updates Release
Get:10 http://security.ubuntu.com feisty-security/multiverse Packages [6099B]
Hit http://us.archive.ubuntu.com feisty/main Packages
Hit http://us.archive.ubuntu.com feisty/restricted Packages
Hit http://us.archive.ubuntu.com feisty/universe Packages
Hit http://us.archive.ubuntu.com feisty/multiverse Packages
Hit http://us.archive.ubuntu.com feisty-updates/main Packages
Hit http://us.archive.ubuntu.com feisty-updates/restricted Packages
Get:11 http://us.archive.ubuntu.com feisty-updates/universe Packages [91.7kB]
Get:12 http://us.archive.ubuntu.com feisty-updates/multiverse Packages [12.7kB]
Fetched 477kB in 2s (191kB/s)
Reading package lists... Done
W: GPG error: http://security.ubuntu.com feisty-security Release: Unknown error executing gpgv
W: GPG error: http://us.archive.ubuntu.com feisty Release: Unknown error executing gpgv
W: You may want to run apt-get update to correct these problems

I have no idea what this means but assume it's related to the integrity bit above. Anyone have any suggestions?