FC6: Yum error

[antonio montagnani]

If I issue any command trying to contact updates repository I get:

 yum list updates
Loading "installonlyn" plugin
Setting up repositories
updates                                                           53 B 00:00
http://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-fc6&arch=i386/repodata/repomd.xml:
[Errno -1] Error importing repomd.xml for updates: Damaged repomd.xml
file
Trying other mirror.
Error: Cannot open/read repomd.xml file for repository: updates

And here is my fedora-updates.repo configuration file for yum:

# Repository : updates
#
[updates]
name=Fedora Core $releasever - $basearch - Updates
baseurl=http://mirrors.fedoraproject.org/mirrorlist?repo=updates-released-fc$releasever&arch=$basearch
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora
enabled=1

Same problem with pirut and yumex.
I searched in bugzilla but I didn't see the solution.
Perfectly running in FC5
-- 
Antonio Montagnani
Skype : antoniomontag