Using the tzupdate tool with java 1.4 does not give the same result as
upgrading the timezone data by building it with javazic. For example, java 1.4 updated with the tzupdate tool supports SystemV/* IDs, but not java 1.4 updated using javazic.

This could create a dependency where an application works with a java
installation updated by the tool, but not with a java installation updated by javazic.

It would be preferable if the two methods of upgrading the timezone data were completely interchangeable, for example by not including the SystemV/* IDs when upgrading java 1.4 with the tzupdate tool.