LastStable and LastSuccessful symbolic links created in wrong location if Build Record Root Directory does not end in builds

CASE A
When the default Build Record Root Directory of ${ITEM_ROOTDIR}/builds is used the lastStable and lastSuccess dir links are located at

${ITEM_ROOTDIR}/lastStable -> builds/2012-01-23_14-50-48
${ITEM_ROOTDIR}/lastSuccess -> builds/2012-01-23_14-50-48

CASE B
When Build Record Root Directory is set to
/Some_shared_drive/builds/${ITEM_FULLNAME}/builds
The result is

/Some_shared_drive/builds/${ITEM_FULLNAME}/lastStable -> builds/2012-01-23_14-50-48
/Some_shared_drive/builds/${ITEM_FULLNAME}/lastSuccess -> builds/2012-01-23_14-50-48

CASE C
When Build Record Root Directory is set to
/Some_shared_drive/builds/${ITEM_FULLNAME}
The result is

/Some_shared_drive/builds/lastStable -> builds/2012-01-23_14-50-48

and /Some_shared_drive/builds/lastSuccess -> builds/2012-01-23_14-50-48

These links are then useless as they do not point to any valid location and they are located in the same directory level as ${ITEM_FULLNAME} so could have been set by any of the jobs.

These links are created in the AbstractBuild class

https://github.com/jenkinsci/jenkins/blob/master/core/src/main/java/hudson/model/AbstractBuild.java
private void createSymlink(TaskListener listener, String name) throws InterruptedException {
        Util.createSymlink(getProject().getBuildDir(),"builds/"+getId(),"../"+name,listener);
    }

Called by

        public final void post(BuildListener listener) throws Exception {
            try {
                post2(listener);

                if (result.isBetterOrEqualTo(Result.UNSTABLE))
                    createSymlink(listener, "lastSuccessful");

                if (result.isBetterOrEqualTo(Result.SUCCESS))
                    createSymlink(listener, "lastStable");
            } finally {
                // update the culprit list
                HashSet<String> r = new HashSet<String>();
                for (User u : getCulprits())
                    r.add(u.getId());
                culprits = r;
                CheckPoint.CULPRITS_DETERMINED.report();
            }
        }