--- sugar-toolkit-0.88.1/src/sugar/bundle/bundle.py.orig	2010-06-03 02:55:42.000000000 -0400
+++ sugar-toolkit-0.88.1/src/sugar/bundle/bundle.py	2010-06-06 10:09:00.000000000 -0400
@@ -71,7 +71,12 @@ class Bundle(object):
         self._zip_file = None
 
         if not os.path.isdir(self._path):
-            self._zip_file = zipfile.ZipFile(self._path)
+            try:
+                self._zip_file = zipfile.ZipFile(self._path)
+            except (zipfile.error, LargeZipFile), ziperror:
+                raise MalformedBundleException(
+                    "Error accessing zip file %s: %s"
+                    % (self._path, ziperror))
             self._check_zip_bundle()
 
         # manifest = self._get_file(self._infodir + '/contents')