When attempted to install debian pkg on a linux box running ubuntu 10.04 LTS according to instructions at http://jenkins-ci.org/debian/,
caught the following errors:

Selecting previously deselected package hudson.
(Reading database ... 156365 files and directories currently installed.)
Unpacking hudson (from /tmp/hudson.deb) ...
dpkg: dependency problems prevent configuration of hudson:
hudson depends on java-virtual-machine; however:
Package java-virtual-machine is not installed.
dpkg: error processing hudson (--install):
dependency problems - leaving unconfigured
Processing triggers for ureadahead ...

I have checked the packages on the machine and java virtual machine, openjdk-6-jre, was already installed. Is there specific version of jvm that must be installed in advance?