Xwiki login issue after upgrading

Hi, We upgraded our standalone wiki installation (jetty,hsql) 1.0-rc1 to 1.1-milestone-2 recently. We backed up all spaces of the old installation and copied/restored them into the new installation. Now, if we directly try to access a page in a space restored from the old installation we get An error page after the successful login: E.g. accessing the following url directly via browser: http://asj5.linzag.at:9021/xwiki/bin/view/DS/Webhome Brings up the login page, after successful login: The requested document could not be found. The Browser URL is: xwiki/bin/view/XWiki/XWikiLogin%3Bjsessionid%3D3f3igkglkf9b7 So, somehow the login page tries to forward to a wrong URL after successful login. Entering the requested URL Manually again in logged in state, the page appears without any problem. Any idea what the problem could be? HANS ------------------------------------------------------------------------------------------ LINZ AG für Energie, Telekommunikation, Verkehr und Kommunale Dienste A-4021 Linz, Wiener Straße 151, Postfach 1300, Tel. +43/732/3400-0, E-Mail: info(a)linzag.at Diese E-Mail wurde auf Computer-Viren geprüft. Verwendete Anti-Virus Software: Trend Micro ScanMail/Pattern 4.549.00-7 Nähere Informationen über E-Mails von der LINZ AG finden Sie im Internet unter: http://www.linzag.at/emailsicherheit This E-Mail was scanned for computer viruses. Used anti-virus software: Trend Micro ScanMail/Pattern 4.549.00-7 In order to find out more information on E-Mails you received by LINZ AG, go to: http://www.linzag.at/emailsecurity ------------------------------------------------------------------------------------------