stacktrace:
java.lang.NullPointerException
at twitter4j.TwitterResponse.getChildText(TwitterResponse.java:80)
at twitter4j.UserWithStatus.<init>(UserWithStatus.java:37)
at twitter4j.Twitter.getUserDetail(Twitter.java:622)
at twitter4j.TwitterTestUnit.testGetUserDetail(TwitterTestUnit.java:121)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:40)

thread on the list:
http://groups.google.com/group/twitter4j/browse_thread/thread/3b1bed0636cae19e