[Users] oVirt Node 2.5.2 ISO - auto_disk_leases=0, require_lease_for_disks=0

Hi all, I installed ovirt node using the new oVirt Node 2.5.2 ISO. NFS works fine now. However: I cannot start any virtual machine, neither new created of imported old ones. I'm using local storage. /var/log/vdsm/libvirt.log ends with: 2012-10-07 14:54:03.693+0000: 22744: error : virNetClientProgramDispatchError:174 : internal error unsupported configuration: Read/write, exclusive access, disks were present, but no leases specified