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IzPack installation files try to preserve backwards compatibility as much as possible yet version 5.0 introduced some incompatible changes - mostly for consistency:
Version change in install.xml (applies to IzPack-5.0.0-beta-11)
The version attribute has been updated from "1.0" to "5.0".
Native elements
The <native> elements must now be contained in a <natives> wrapping element under 5.0. See the section on Native Libraries.
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