jenkins/view/project/view/subproject can't be modified and /api/json can't be accessed. On deploy:

garrucha:/hudson/jboss/server/default/log> vi server.log
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.InstantiationException: hudson.model.View$PropertyList
at java.lang.Class.newInstance0(Class.java:340)
at java.lang.Class.newInstance(Class.java:308)
at hudson.util.DescribableList$ConverterImpl.unmarshal(DescribableList.java:248)
... 41 more
2011-04-14 12:18:05,780 WARNING [hudson.util.RobustReflectionConverter] (Loading global config) Failed to resolve a type
java.lang.InstantiationError
at hudson.util.DescribableList$ConverterImpl.unmarshal(DescribableList.java:252)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:82)