Some pages on french Wikipedia have strangely moved to main namespace :
select * from page where page_namespace=0 and page_title like "Utilisateur:%"
should be in user: namespace
select * from page where page_namespace=0 and page_title like "Wikipédia:%"
should be in wikipedia namespace
I have noticed them because bots think they are orphan articles an report them to me (starting January 28). "Wikipédia:AbuseFilter/Conditions utilisées" was reported too but seems to be in the right namespace now.