libvirt users - Sep 2013 - internal error: unexpected migration status in setup

Hello.

Suddenly on one of my vm's i get:

2013-09-06 09:44:39.501+0000: 2277: error : 
qemuMonitorJSONGetMigrationStatusReply:2377 : internal error: unexpected 
migration status in setup

This happens when i try to migrate /and/ when i try to do a "savevm".

error: Failed to save domain domain to /opt/virt-backup-
blockcopy/domain/domain-memory
error: internal error: unexpected migration status in setup

What is this migration status thing and how can i change that?

thanks and best regards
t.