Don't think this is a bug. Are able to successfully open the AccessPoint, but then do not see the QVWs? If yes, that is typically a permissions issue. Have you checked the Windows Effective Access for the QVW files?
Yes we have checked and no one time. We have also try to add a windows full access for the user on the qvw without change.We have also try to access the QVW with this user and a QV desktop and it's work. But we continue to have an empty AccessPoint.
we also upgraded to 12 and had a similar problem couple weeks ago. Users couldnt see documents in access point that they were licenced to see. Permision sets on the files (qvw) themselves seem to cause it. These documents were listed as accessible to all domain users (Everyone) and local users (qvServerName\Users) but still no one coud see them. Even permisions by name didnt help. What did help was making a user group on the domain controler, assigning users to that group and setting permisions for the document to include this group (also disabling permision inheritance on the folder documents are in).