I am a bit baffled by this one. For some reason char* str = 0 and char* str = NULL are not doing the same things for Win32 build. As this is the root problem with crashing with Aiksaurus on an empty document. For other systems they are equivalent. So I am making the change to keep Windows from crashing
Modified files (abiword-plugins module) tools/aiksaurus/Makefile tools/aiksaurus/xp/AiksaurusABI.cpp