--- PySystemState.java.orig     2010-08-06 15:08:04.158036500 -0400
+++ PySystemState.java  2010-08-06 15:11:23.486161500 -0400
@@ -44,6 +44,7 @@
     public static final String JYTHON_DEV_JAR = "jython-dev.jar";

     private static final String JAR_URL_PREFIX = "jar:file:";
+    private static final String VFSZIP_URL_PREFIX = "vfszip:";
     private static final String JAR_SEPARATOR = "!";

     public static final PyString version = new PyString(Version.getVersion());
@@ -1084,6 +1085,11 @@
                 if (urlString.startsWith(JAR_URL_PREFIX) && jarSeparatorIndex > 0) {
                     jarFileName = urlString.substring(JAR_URL_PREFIX.length(), jarSeparatorIndex);
                 }
+                else if(urlString.startsWith(VFSZIP_URL_PREFIX)) {
+                   //36 = length of "/org/python/core/PySystemState.class"
+                   //vfszip does not contain an !
+                   jarFileName = urlString.substring(VFSZIP_URL_PREFIX.length(), urlString.length() - 36);
+                }
             } catch (Exception e) {}
         }
         return jarFileName;