Alexis Moinet schrieb:
Moreover, if I go to Special:Allpages --> namespace : Mediawiki, I got an empty page. Does anybody noticed this ?
Dear Alexis, yes, I can confirm, that there issomething unusual.
Mediawiki:Sidebar doesnt exist in my wiki. Do you cleared your browser-cache? e.g. STRG-SHIFT-R in Firefox, while watching Mediawiki:Sidebar.
My "Special:Allpages --> namespace : Mediawiki" shows 3 pages (Login, Mainpage, Sitenotice). Perhaps i edited them, its not a fresh install.
Regards, Jan