Can you retest if cacao from the oneiric 6b23~pre11-0ubuntu1.11.10 update work for you (latest security update)?
xranby@panda-oneiric:~$ java -cacao -version java version "1.6.0_23" IcedTea Runtime Environment (IcedTea6 1.11pre) (6b23~pre11-0ubuntu1.11.10) CACAO (build 1.1.0pre2, compiled mode)
Can you retest if cacao from the oneiric 6b23~pre11- 0ubuntu1. 11.10 update work for you (latest security update)?
xranby@ panda-oneiric: ~$ java -cacao -version 0ubuntu1. 11.10)
java version "1.6.0_23"
IcedTea Runtime Environment (IcedTea6 1.11pre) (6b23~pre11-
CACAO (build 1.1.0pre2, compiled mode)