Problem with openjdk update and Djigzo

Hello

we use Ubuntu 8.04 LTS with Djigzo and openjdk as Java VM. With the
recent updates we got the following problems:
- The openjdk updates require the package "ca-certificates-java" which
is not available in the online repositories for Ubuntu 8.04 LTS
- If the package "ca-certificates-java" is installed "by hand" the
following "apt-get dist-upgrade" try to remove ant,ant-optional and
djigzo???

While this is for sure a problem of the openjdk package it would be
nice to hear if someone is using Ubuntu 8.04 and is aware of some
workaround for this beside not using updates.

Many Thanks

Andreas