Multilingual's $ml->getLanguageText returns ISO code since update to 5.6.2.1

Permalink
I just updated a site to 5.6.2.1.

Everything looks fine, except for my language switcher widget. For some reason,the line

<?php print $ml->getLanguageText($ml->getLocale()); ?>


no longer outputs the name of each language ("English", "deutsch", "suomi"...) but its ISO code ("en", "de", "fi"....)

The output of

$ml->getLocale()
is still `en_US`, `de_DE`, `fi_FI`, etc.

Does anybody have an explanation why?

pekka