Besides bug fixes and cleanups this release mainly features a re-designed XSPF writing API and malicious XML detection à la billion laughs. The writing API in previous releases was unnecessary ugly; I think it got better. Malicious XML detection should be of most interest to people using libSpiff in web services. More about its internals and configuration can be found in the API documentation. Please note this release is neither source- nor binary- compatible to previous releases (including 1.0.0rc3).