--- filefield_meta/filefield_meta.install	2010-06-16 17:06:44.000000000 -0500
+++ filefield_meta/filefield_meta.install.new	2010-06-17 03:28:06.000000000 -0500
@@ -163,7 +163,13 @@ function filefield_meta_update_6100(&$co
   }
 
   // Update our progress indicator.
-  $ret['#finished'] = $context['sandbox']['progress'] / $context['sandbox']['total'];
-
-  return $ret;
+  // Avoid dividing by zero.
+  if ($context['sandbox']['total'] == 0) {
+    $ret['#finished'] = 1;
+    return $ret;
+  }
+  else {
+    $ret['#finished'] = $context['sandbox']['progress'] / $context['sandbox']['total'];
+    return $ret;
+  }
 }