Many thanks Brandon, it worked !
I moved to the new skin wich is far better ... Thanks to all for this release ! :)
Jérémie.
  -----Original Message-----
 From: Esbach, Brandon [mailto:Esbachb@tycoelectronics.com]
 Sent: mardi 30 janvier 2007 15:48
 To: xwiki-users(a)objectweb.org
 Subject: RE: [xwiki-users] Migration 0.9.840 --> BETA3, skins problems
 I had this with both B1 and B2 (have not yet gone B3 on our
 production servers).
 The solution for me was to login with the superuser, change
 the admin password to one you know; then login with admin and
 carry on.
 I also changed the skin at that point to refer to the
 official one (and then once I'm happy the system is
 functional, change to our own custom one).
 -----Original Message-----
 From: BOUSQUET Jeremie [mailto:Jeremie.BOUSQUET@gemalto.com]
 Sent: 30 January 2007 13:07
 To: xwiki-users(a)objectweb.org
 Subject: RE: [xwiki-users] Migration 0.9.840 --> BETA3, skins problems
 Hi,
 Does anybody experience this login problem with beta3 ? I
 think it occurred on 0.9.840 also, but I can't remember ...
 I tried as a workaround to set all rights to XWikiGuest user
 on my old wiki (0.9.840), then export the mysql dump, import
 it in xwikibeta3, in order to have full rights without loging in.
 Now I can access the administrative pages, but I cannot save
 any modification either (I'm redirected to the login page and
 again and again ...)
 Thanks for your help,
 Jérémie Bousquet
  1 - I just cannot log in my new xwiki with my old
registered users,
 and I can't neither with the "Admin"/"admin" user. So I  
cannot update
  the preferences in any way ... The log in page
just  
 refreshes itself
  indefinitely.