Bug#665817: Search plugins from en-US should be used when there are no $general.useragent.locale ones.

[Andres Cimmarusti]

> Oh wait, did you install 11, then 10, then 11 again?

I had 11 (which was working fine). Then downgraded to 10 and it was
broken. Upgrading back to 11 was fine again.

Sorry for the confusion.

Andres

PS: I figured an tracking the ESR would be better for a Squeeze
system, from a stable point of view.