Can't anybody help me? After all adding richfaces should be a basic task. I've now attached the whole relevant log above. I'm a beginner but it seems to me, that cssparser jar is corrupt. How an this be and what should be done?
If you think a corrupt jar file is the problem, try deleteing it from you local maven repository, and rebuilding your application.
Failing that, try downloading and building the dev-examples. Any problems building deploying those should be enough to isolate what's different about your environment,