Hi,
I don't know how it was before. Now I've seen a strange thing: in mod_j1.5
We have the german translation, but I have always the english text. It's written in the right way in language.php.
It seems only to be in this 2 phrases:
'There are no [groups] available.' and
'There are no [categories] available.'
It's not only in module, it's in whole groupjive (and I would say, that was right before).