Since Jenkins version 1.526 my Console Logs do not log any Maven errors. Version 1.525 was still ok.
To reproduce this I tried deploying artifacts to a bogus repository, normally I would get something like this:
message : Failed to execute goal org.apache.maven.plugins:maven-deploy-plugin...
But there is nothing now. Using Maven 3.0 or 3.1 makes no difference as well as calling Maven with -e or -X.
Jenkins and Maven plugin are at the same version (tried it with 1.526 and 1.528) only version 1.525 and lower gave me error messages in the log.