JSON plugin class loading problem?

[Jim_Greuel]

I am using version 0.32 of the JSON plugin with Struts 2.0.11.  It seems 
to work well except for the fact that the JSON results from my struts 
action are inconsistent.
I have annotated my action as follows:

@Results( {
        @Result(name = "jsonPopsResult", type = JSONResult.class, value = 
"", params = {"root", "jsonResult", "noCache", "true"}),
        @Result(name = "jsonRefugesResult", type = JSONResult.class, value 
= "", params = {"root", "jsonResult", "noCache", "true"})})
public class MapQueryAction extends ActionSupport {
...
}

Sometimes the response generated by the action is (for example)

        {"trustResources":[{"displayName":"Bull Trout","id":301}]}

at other times it is

        {"jsonResult":{"trustResources":[{"displayName":"Bull 
Trout","id":301}]}}

Note that the second response has an outer level of wrapping that 
corresponds to the root parameter in the annotation (the action property 
to be serialized).

I think (though am not 100% positive) that the change in behavior happens 
when I restart my tomcat container, so this smells strongly of a class 
loading problem.  I've looked for duplicate jars/classes, but have come up 
empty.  In particular, I have only one json-plugin jar 
(json-plugin-0.32.jar) in my application's WEB-INF/lib directory.  Has 
anyone else experienced this kind of problem with the JSON plugin?

Thanks,
Jim Greuel