I am currently facing the following problem with Maven 3 when I am trying to build the site. I will appreciate you help on this.
mvn clean site
As pointed out by this answer, there is a bug in the site plugin, which only looks for dependencies in what it thinks is Maven central.
I am having the same problem in Maven 3.0.4 and site-plugin 3.3 . I also have the issue that it works in my development machine which is running Windows 7, but not in the CI-Server which is running Jenkins on Debian.