[Zope] zope.org weird management screen pbs

Hello, I'm managing my page at zope;org, ans weird things happens when after changing some properties, adding/mofiying objetcs, i get back to the OLD versions. Multiple reload, clear cache, does have NO effects. I use Opera 5.12 and IE 5.50.4522.1800 Any idea about this ? This seems quite a new behaviour since some days. Didier