Updated Jenkins, M2 Release Plugin from 0.10.0 to 0.12.0 and executed a build which had been working under 0.10.0. The build failed and I had to roll back to the previous release (0.10.0) and rebuild (which worked). The system gave a build error message as follows.

Oct 18, 2013 2:15:47 PM org.apache.maven.cli.event.ExecutionEventLogger mojoStarted
INFO: — maven-install-plugin:2.3.1:install (default-install) @ citi-service-gateway —
[INFO] Installing /usr/local/jenkins/workspace/Citi Service Gateway/target/citi-service-gateway-2.0.3-SNAPSHOT.jar to /home/tomcat/.m2/repository/com/b2s/service/citi/citi-service-gateway/2.0.3-SNAPSHOT/citi-service-gateway-2.0.3-SNAPSHOT.jar
[INFO] Installing /usr/local/jenkins/workspace/Citi Service Gateway/pom.xml to /home/tomcat/.m2/repository/com/b2s/service/citi/citi-service-gateway/2.0.3-SNAPSHOT/citi-service-gateway-2.0.3-SNAPSHOT.pom
[INFO] Installing /usr/local/jenkins/workspace/Citi Service Gateway/target/citi-service-gateway-2.0.3-SNAPSHOT-sources.jar to /home/tomcat/.m2/repository/com/b2s/service/citi/citi-service-gateway/2.0.3-SNAPSHOT/citi-service-gateway-2.0.3-SNAPSHOT-sources.jar
[INFO] Installing /usr/local/jenkins/workspace/Citi Service Gateway/target/citi-service-gateway-mule-app.zip to /home/tomcat/.m2/repository/com/b2s/service/citi/citi-service-gateway/2.0.3-SNAPSHOT/citi-service-gateway-2.0.3-SNAPSHOT-mule-app.zip
[INFO] Installing /usr/local/jenkins/workspace/Citi Service Gateway/target/citi-service-gateway-2.0.3-SNAPSHOT-standalone.zip to /home/tomcat/.m2/repository/com/b2s/service/citi/citi-service-gateway/2.0.3-SNAPSHOT/citi-service-gateway-2.0.3-SNAPSHOT-standalone.zip
Oct 18, 2013 2:15:48 PM org.apache.maven.cli.event.ExecutionEventLogger logResult
INFO: ------------------------------------------------------------------------
Oct 18, 2013 2:15:48 PM org.apache.maven.cli.event.ExecutionEventLogger logResult
INFO: BUILD FAILURE
Oct 18, 2013 2:15:48 PM org.apache.maven.cli.event.ExecutionEventLogger logStats
INFO: ------------------------------------------------------------------------
Oct 18, 2013 2:15:48 PM org.apache.maven.cli.event.ExecutionEventLogger logStats
INFO: Total time: 3:10.417s
Oct 18, 2013 2:15:48 PM org.apache.maven.cli.event.ExecutionEventLogger logStats
INFO: Finished at: Fri Oct 18 14:15:48 EDT 2013
Oct 18, 2013 2:15:49 PM org.apache.maven.cli.event.ExecutionEventLogger logStats
INFO: Final Memory: 41M/356M
Oct 18, 2013 2:15:49 PM org.apache.maven.cli.event.ExecutionEventLogger sessionEnded
INFO: ------------------------------------------------------------------------
Waiting for Jenkins to finish collecting data

The files from the "Installing" lines are in place and appear to be from the build based on their time stamps. It appears the M2 Release Plugin is giving an invalid "BUILD FAILURE" message.