"Publisher could not be verified"

[witch]

I get this message every time any user wants to click on an exe - not just remote ones - and the user has to click the 'run' button - sometimes more than once.
I have searched around and it seems to be modifiable in group policy, but in Server 2008 I cannot find the setting.
I'm sure I've just missed it, can anyone help?

[witch]

* bump
One of you clever lot must know

[kmount]

Annoyances.org - "The publisher could not be verified" prompt running executable from network (Windows Vista Discussion Forum)

Maybe?

(I know you said its local not network but.....)