Hi, I have been facing the same problem. It's a maven-assembly-plugin2.2-beta-2 bug; check http://jira.codehaus.org/browse/MASSEMBLY-328 . The workaround I found is to specify the version 2.1 of the maven-assembly-plugin in my pom, normally your artifact will correctly be installed in your repository without the assemblyId at the end of its name.
Regards, Juien Simon.
