Index: src/org/python/core/packagecache/PathPackageManager.java
===================================================================
--- src/org/python/core/packagecache/PathPackageManager.java	(revision 7292)
+++ src/org/python/core/packagecache/PathPackageManager.java	(working copy)
@@ -76,10 +76,15 @@
         private boolean python;
 
         public boolean accept(File dir, String name) {
-            if(name.endsWith(".py") || name.endsWith("$py.class") || name.endsWith("$_PyInner.class")) {
-                python = true;
-            }else if (name.endsWith(".class")) {
+            if (new File(dir, name).isDirectory()) {
+                // The subdirectory might contain Java code:
                 java = true;
+            } else {
+                if(name.endsWith(".py") || name.endsWith("$py.class") || name.endsWith("$_PyInner.class")) {
+                    python = true;
+                }else if (name.endsWith(".class")) {
+                    java = true;
+                }
             }
             return false;
         }