Doing the initial configuration of Mozilla on this machine, I attempted to change the preferred language from en-us to en-gb (incidentally, given that most people will not attempt this, I think that plain en should be the default). The change was not accepted, either immediately, or after exiting and re-entering preferences. Similarly for selecting plain en and for explicitly typing en-gb, as well as choosing from the menu. The first time, the OK on the whole of preferences wouldn't work, and I had to cancel, but I'd made many other changes and couldn't repeat this, latter, effect.

Resolving as dup of the 0.9.6 bug about same. Please remember to always include build ID in bug-reports. *** This bug has been marked as a duplicate of 109629 ***

> Please remember to always include build ID in bug-reports. Bug #113138 raised against bugzilla.mozilla.org!

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