The Shrinkwrap static API to create and interact with Archives often makes use of the ThreadContextClassLoader which is problematic in a modular environment such as JBoss Modules and OSGi.

Shrinkwrap should be made more friendly toward systems that use a classloader per module. For more background, see this email thread:
http://lists.jboss.org/pipermail/jboss-as7-dev/2010-December/000122.html