In my module in Netbeans project (www.netbeans.org) I have the following piece of code:
public boolean isImportant(String name) {
  Reference rf = findReference(name);
  if (rf != null) {
    CacheReference ref = (CacheReference)rf;
    return ref.isImporant();
  }
}

I've received a bug report (please see: http://javacvs.netbeans.org/issues/show_bug.cgi?id=16422 )
that under the jdk1.4beta2 this piece of code throws a NPE (sometimes, not regularly) it seems like the ref is null, even when I checked it for that value..

any ideas what might be wrong? The reporter states that it doesn't happen under jdk1.3..

thanks..