CentOS virt - Mar 2015 - virt-manager broken ?

Hello,

with the last update for virt-manager I have a Problem with my CPU (XEON-
SandyBridge) I have to disable the CPU Flag "invts", afterward I can
install a
KVM Guest!

Now with the coming upgrade to centos 7.1 in the virt-manager the CPU Flag 
config is missing and I can't install a KVM Guest anymore :-(.

Is this a know BUG? 
-- 
mit freundlichen Gr??en / best Regards,

  G?nther J. Niederwimmer