don't connect to imagestore.canonical.com

[nix_user]

Description: Ubuntu 11.10
Release: 11.10
python-image-store-proxy:
  Installed: 1.0.4-0ubuntu5
  Candidate: 1.0.4-0ubuntu5
  Version table:
 *** 1.0.4-0ubuntu5 0
        500 http://by.archive.ubuntu.com/ubuntu/ oneiric/universe amd64 Packages
        100 /var/lib/dpkg/status

After installation on Eucalyptus front end node I have following in web interface

Store
Error 60: server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none

also more info in log file
/var/log/image-store-proxy/image-store-proxy.log
Error handling request: Traceback: <class 'imagestore.proxyservice.ProxyServiceError'>: Error 60: server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
/usr/lib/python2.7/dist-packages/imagestore/lib/service.py:208:_threadLoop
--- <exception caught here> ---
/usr/lib/python2.7/dist-packages/imagestore/lib/service.py:88:fromThreadExecute
/usr/lib/python2.7/dist-packages/imagestore/lib/service.py:119:wrappedHandler
/usr/lib/python2.7/dist-packages/imagestore/proxyservice.py:81:_getUpgrades
/usr/lib/python2.7/dist-packages/imagestore/proxyservice.py:67:_fetch

Error appear when image-store-proxy try connect to imagestore.canonical.com, I think it is because pycurl library linked against gnutls.

gnutls-cli --print-cert --x509cafile /dev/null -p 443 imagestore.canonical.com 2>&1| certtool --verify-chain
I don't sure but this bug borrowed from Debian packages and affect not only image-store-proxy package
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=573736