Hi
http://blog.internetnews.com/skerner/2011/01/fedora-linux-suffers-a-secur...
"Long story short is that a Fedora contributor had his/her credentials
stolen and then an attacker began to use those credentials to attempt to
tamper with the Fedora infrastructure. Due to the limited privileges of
the exploited account (and some good luck) it appears as though there
has been no risk to Fedora's build or infrastructure."
Rahul