That did not work for me. It looks like it's a bug in gnome-keyring.
https://bugs.launchpad.net/ubuntu/+source/gnome-keyring/+bug/187127

I did the following to resolve the problem:

mv /usr/lib/gnome-keyring/gnome-keyring-ask 
/usr/lib/gnome-keyring/gnome-keyring-ask.orig
ln -s /bin/true /usr/lib/gnome-keyring/gnome-keyring-ask

Not the best solution, but was the only option I found that worked and 
did not seem to break anything that I use.

James Mcphee wrote:
> Google-foo says
> gconftool-2 --set -t bool /apps/gnome-keyring/daemon-components/ssh false
> http://live.gnome.org/GnomeKeyring/Ssh
>
> I can't say if it work, as I like the little poppup.
>
>
> On Wed, Dec 10, 2008 at 1:30 PM, der.hans <PLUGd@lufthans.com 
> <mailto:PLUGd@lufthans.com>> wrote:
>
>     moin moin,
>
>     after and upgrade to Intrepid, SSH ( run from a shell in screen ) is
>     popping up a gnome-keyring GUI asking for the password to unlock a
>     private
>     key.
>
>     This is essentially a DoS in addition to being annoying on many
>     levels.
>
>     Since I run it from screen and don't actually look at that desktop
>     very
>     often, I didn't realize there was a GUI waiting for a response. There
>     should not have been.
>
>     Once I detected the GUI I notice it refuses to yield focus.
>     Double-bad.
>     Ah, it'll yeild the focus, but not the keyboard. Even more double-bad.
>
>     DISPLAY is not set, so there should be no GUI popping up for any
>     reason.
>
>     I generally run this particular command remotely, so knowing that
>     a GUI
>     popped up doesn't really help. Well, I can kill the GUI via
>     another shell
>     should I remember what the problem is.
>
>     Any suggestions on how to turn this GUI off?
>
>     I can remove ssh-askpass-gnome and break ubuntu-desktop.
>
>     I can remove id_dsa.
>
>     In other circumstances neither of those would be an option. I
>     suppose I
>     could use -i to specify a non-existent identity file, but
>     intentionally
>     breaking things generally seems like the wrong solution.
>
>     ciao,
>
>     der.hans
>     --
>     #  http://www.LuftHans.com/        http://www.LuftHans.com/Classes/
>     #  I've got a photographic memory,
>     #  but I'm lousy photographer. - der.hans
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>
>
> -- 
> James McPhee
> jmcphe@gmail.com <mailto:jmcphe@gmail.com>
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