I just pulled jaxb from CVS, and tried to build it, and got:
compile:
[javac] Compiling 223 source files to
/Users/benson/x/jaxb/jaxb-ri/runtime/build/classes
[javac]
/Users/benson/x/jaxb/jaxb-ri/runtime/src/com/sun/xml/bind/v2/model/impl/ReferencePropertyInfoImpl.java:294:
cannot find symbol
[javac] symbol : method required()
[javac] location: @interface javax.xml.bind.annotation.XmlElementRef
[javac] return ref.required();
[javac] ^
[javac] Note: Some input files use or override a deprecated API.
[javac] Note: Recompile with -Xlint:deprecation for details.
[javac] Note: Some input files use unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
[javac] 1 error
BUILD FAILED