I set up my certificates, ca client and server, as described in your documentation: http://wiki.libvirt.org/page/TLSCreateServerCerts. 

I followed it step by step so it must be ok.

However, when I run 

virsh -c qemu://192.168.1.2/system and I try a command like

list --all

I get:

error: impossible connect to the hypervisor

errore: no valid connection

errore: Unable to set x509 CA certificate: /etc/pki/CA/cacert.pem: Error while reading file.

If I run the same command with root privileges:

virsh -c qemu://192.168.1.2/system

everything works, anyway I get this warning too:

2014-02-26 13:03:25.035+0000: 10825: info : libvirt version: 1.1.1

2014-02-26 13:03:25.035+0000: 10825: warning : virNetTLSContextCheckCertKeyPurpose:364 : Certificate /etc/pki/libvirt/clientcert.pem purpose does not allow use for with a TLS client

I don't know if it is a problem, I need to live migrate machines...

Anyway, main problem is that I don't want to run virsh with root privileges.

Where the problem is?