[i18n] Language choice not honoured in Horde

[Ragnar Wisloff]

I've installed Horde 2.2.5 on a Debian Sarge system using debs. Trying 
to change language (any language) in the user settings has no effect, 
nor changing it in horde2/config/lang.php to e.g.

$nls['defaults']['language'] = 'nb_NO';

Nothing is reported in the log which is running at debug level.
The i18n files are in place in horde2/locale and horde2/po


Any ideas where I should start looking?


-- 
Med vennlig hilsen
Ragnar Wisløff
-------------
Life is a reach. Then you gybe.