Categories encoding problems

Hi,
I have a problem with categories in Elgg 1.6 using a different encoding set : the system can't deal with (French) accents.
I checked in the DB and anything saved with this category (blog, pages) is not encoded properly.
I wonder why categories are not tags that can be translated directly.
Is there anyway to fix this ?

Thanks for your reply and  great work for 1.6 !

Pierre