XStream 1.3 ignores suddenly annotated converters (@XStreamConverter and @XStreamConverters)?
XStream treats now all annotations the same and therefore it no longer auto-detects any annotation by default. You can configure XStream to run in auto-detection mode, but be aware if the implications. As alternative you might register the deprecated AnnotationReflectionConverter, that was used for XStream pre 1.3.x, but as drawback the functionality to register a local converter with XStream.registerLocalConverter will no longer work.