yum downgrade is available to allow to go back to the previous version of the specified software available in the repositories.
# rpm -q vorbis-tools vorbis-tools-1.2.0-8.fc12.i686 # yum downgrade vorbis-tools ... Resolving Dependencies --> Running transaction check ---> Package vorbis-tools.i686 1:1.2.0-6.fc12 set to be updated ---> Package vorbis-tools.i686 1:1.2.0-8.fc12 set to be erased --> Finished Dependency Resolution Dependencies Resolved =========================================================================================== Package Arch Version Repository Size =========================================================================================== Downgrading: vorbis-tools i686 1:1.2.0-6.fc12 fedora 157 k Transaction Summary =========================================================================================== Erase 0 Package(s) Reinstall 0 Package(s) Downgrade 1 Package(s) Total download size: 157 k Is this ok [y/N]:y Downloading Packages: Setting up and reading Presto delta metadata Processing delta metadata Package(s) data still to download: 157 k vorbis-tools-1.2.0-6.fc12.i686.rpm 157 kB 00:01 Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Installing : 1:vorbis-tools-1.2.0-6.fc12.i686 1/2 Cleaning : 1:vorbis-tools-1.2.0-8.fc12.i686 2/2 Erased: vorbis-tools.i686 1:1.2.0-8.fc12 Installed: vorbis-tools.i686 1:1.2.0-6.fc12 Complete! # rpm -q vorbis-tools vorbis-tools-1.2.0-6.fc12.i686
yum downgrade reliably you should enable [updates-testing] repository and issue a yum update ... and then, if it does not work, you can rollback to the previous version in [updates] or in [fedora] repo with yum downgrade ....