About a month ago an intrusion into Fedora servers was detected, and while the signing key for all packages was not compromised Fedora still decided to resign all packages with a new key as a security measure. A few days ago repositories with the new key were enabled. That leads to quite a few unresolved dependency problems if you’re still using the default repositories on Aspire One Linux, which are not updated anymore. To enable updates-newkey and switch to the new repositories just use the command below.
sudo yum install fedora-release
The above instructions on how to install Firefox3.5 on an Acer AA1 running Linpus, the original article can be found here http://macles.blogspot.com/