-737944 NEW https://bugzilla.redhat.com/show_bug.cgi?id=737944
- virt-win-reg hyphen (delete key) syntax may be wrong, and is not documented
+745576 NEW https://bugzilla.redhat.com/show_bug.cgi?id=745576
+ libguestfs (or qemu?) hangs if sparse file runs out of disk space