Probably a regression due to recent factoring of JUnit support. In hudson/tasks/junit/CaseResult/index.jelly:

<j:if test="${it.className != it.parent.name}">
(from <st:out value="${it.parent.name}"/>)
</j:if>

seems to always be true now, whereas this is supposed to be an exceptional case. (Should be true only if you have a JUnit 3.x-style test with a suite() method which runs tests from a different class.)