diff -rup vote_up_down/vud.module vote_up_down_new/vud.module
--- vote_up_down/vud.module	2010-10-22 17:46:25.000000000 +1100
+++ vud.module	2010-10-26 11:37:04.039937002 +1100
@@ -215,7 +215,17 @@ function vud_ctools_plugin_directory($mo
  */
 function vud_votingapi_results_alter(&$cache, $content_type, $content_id) {
   $vud_cache = _vud_get_standard_results($content_type, $content_id);
-  $cache = array_merge_recursive($cache, $vud_cache);
+
+  // Don't just array_merge_recursive() the whole cache or numeric indexes
+  // will be reindexed, possibly breaking other modules votes.
+  // Instead, just merge the tag that we care about.
+  $tag = variable_get('vud_tag', 'vote');
+  if (isset($cache[$tag]) && is_array($cache[$tag])) {
+    $cache[$tag] = array_merge_recursive($cache[$tag], $vud_cache[$tag]);
+  }
+  else {
+    $cache[$tag] = $vud_cache[$tag];
+  }
 }
 
 /**