diff --git a/chrome/content/zotero/xpcom/citeproc.js b/chrome/content/zotero/xpcom/citeproc.js
index ea92eeb2e..039a7a20a 100644
--- a/chrome/content/zotero/xpcom/citeproc.js
+++ b/chrome/content/zotero/xpcom/citeproc.js
@@ -253,7 +253,7 @@ var CSL = {
         "delimiter"
     ],
     PARALLEL_MATCH_VARS: ["container-title"],
-    PARALLEL_TYPES: ["bill","gazette","legislation","legal_case","treaty","article-magazine","article-journal"],
+    PARALLEL_TYPES: ["bill","gazette","regulation","legislation","legal_case","treaty","article-magazine","article-journal"],
     PARALLEL_COLLAPSING_MID_VARSET: ["volume", "issue", "container-title", "section", "collection-number"],
     LOOSE: 0,
     STRICT: 1,
@@ -9882,7 +9882,7 @@ CSL.Transform = function (state) {
                 }
             }
         }
-        if (!value && altvar && Item[altvar] && use_field) {
+        if (!value && Item.type !== 'legal_case' && altvar && Item[altvar] && use_field) {
             value = Item[altvar];
         }
         if (!value) {
@@ -13224,6 +13224,7 @@ CSL.Disambiguation.prototype.disExtraText = function () {
         if (this.modeindex === this.modes.length - 1) {
             var base = this.lists[this.listpos][0];
             for (var i = 0, ilen = this.lists[this.listpos][1].length; i < ilen; i += 1) {
+                this.state.tmp.taintedItemIDs[this.lists[this.listpos][1][i].id] = true;
                 this.state.registry.registerAmbigToken(this.akey, "" + this.lists[this.listpos][1][i].id, base);
             }
             this.lists[this.listpos] = [this.betterbase, []];