I have tried running both the Linux and Windows versions of ODF Validator v0.20-alpha-2, and they both crash during validation and produce the same type of error.
"An unexpected error occurred during validation: java.util.MissingResourceException: Can't find bundle for base name com.thaiopensource.datatype.xsd.resources.Messages, locale en_US
java.util.MissingResourceException: Can't find bundle for base name com.thaiopensource.datatype.xsd.resources.Messages, locale en_US"
Johan