Effective immediately, the JACKS test suire has moved, it is now part of the Mauve project at http://sources.redhat.com/mauve/. See the announcement on the mailing list for more details: http://www-124.ibm.com/pipermail/jikes-announce/2004-October/000089.html
This release supports compilation using the rt.jar shipped with the released version of Java 5.0, but otherwise has no more support for new language features than 1.21 did. A number of bugs were also corrected. Full details on the release page: http://www-124.ibm.com/developerworks/downloads/detail.php?group_id=10&what=rele&id=773
A regression in 1.20 that caused us to complain about supposedly invalid .class files has been rectified. Some minor error message improvements have been made.