According to http://oss.software.ibm.com/developerworks/opensource/jikes/ news jikes 1.21 was released on May 16, 2004. I think it makes sense to update Sisyphus package because of http://oss.software.ibm.com/developerworks/forum/forum.php?group_id=10&forum_id=700. <cite>A regression in 1.20 that caused us to complain about supposedly invalid .class files has been rectified.</cite> Albeit I didn't run into described bug personally.
jikes-1.22-alt1.1
Давно надо было закрыть :-)