$ yum upgrade
Setting up Upgrade Process
--> Running transaction check
---> Package calibre.x86_64 0:0.6.35-1.fc12 set to be updated
--> Processing Dependency: python-cssutils >= 0.9.6 for package: calibre-0.6.35-1.fc12.x86_64
--> Finished Dependency Resolution
calibre-0.6.35-1.fc12.x86_64 from updates has depsolving problems
--> Missing Dependency: python-cssutils >= 0.9.6 is needed by package calibre-0.6.35-1.fc12.x86_64 (updates)
calibre-0.6.35-3.fc12 has been submitted as an update for Fedora 12.
calibre-0.6.35-3.fc12 has been pushed to the Fedora 12 stable repository. If problems still persist, please make note of it in this bug report.