diff -r 3fcc279c921b -r a2c0afa35c09 emul/mini/src/main/java/java/lang/Class.java
--- a/emul/mini/src/main/java/java/lang/Class.java	Mon Jan 28 18:15:21 2013 +0100
+++ b/emul/mini/src/main/java/java/lang/Class.java	Fri Feb 01 18:35:21 2013 +0100
@@ -347,6 +347,9 @@
      * @since JDK1.1
      */
     public boolean isInstance(Object obj) {
+        if (obj == null) {
+            return false;
+        }
         if (isArray()) {
             return isAssignableFrom(obj.getClass());
         }