(See this page for the original report of this bug in context)

The fix for JENKINS-16971 (e8dcf5c) breaks my Jenkins TAP plugin installation. Specifically, the detail links on the http://jenkins.example.org/job/JOBNAME/BUILDNUM/tapTestReport/ page are incorrect. They should read something like http://jenkins.example.org/job/JOBNAME/BUILDNUM/tapTestReport/summary.tap-1/. Instead they read something like http://jenkins.example.org/var/lib/jenkins/jobs/JOBNAME/builds/2013-04-04_12-43-45/tap-master-files/test/mpi/summary.tap-1/. Obviously this URL is invalid and yields an HTTP 404 from the web server.
I suspect the problem is caused by the replacement of getName() with getAbsolutePath(). Reverting commit e8dcf5c fixes the error in my otherwise clean build of 80a01b1. I made no attempt to test or understand the issue actually reported in and/or addressed by JENKINS-16971.