diff --git a/chrome/content/zotero/preferences/preferences_search.js b/chrome/content/zotero/preferences/preferences_search.js
index 711a06568..6b3b56631 100644
--- a/chrome/content/zotero/preferences/preferences_search.js
+++ b/chrome/content/zotero/preferences/preferences_search.js
@@ -447,8 +447,8 @@ Zotero_Preferences.Search = {
 		var ps = Components.classes["@mozilla.org/embedcomp/prompt-service;1"].
 				createInstance(Components.interfaces.nsIPromptService);
 		var buttonFlags = (ps.BUTTON_POS_0) * (ps.BUTTON_TITLE_IS_STRING)
-			+ (ps.BUTTON_POS_1) * (ps.BUTTON_TITLE_IS_STRING)
-			+ (ps.BUTTON_POS_2) * (ps.BUTTON_TITLE_CANCEL);
+			+ (ps.BUTTON_POS_1) * (ps.BUTTON_TITLE_CANCEL)
+			+ (ps.BUTTON_POS_2) * (ps.BUTTON_TITLE_IS_STRING);
 		
 		var index = ps.confirmEx(null,
 			Zotero.getString('zotero.preferences.search.rebuildIndex'),
@@ -456,13 +456,15 @@ Zotero_Preferences.Search = {
 				Zotero.getString('zotero.preferences.search.indexUnindexed')),
 			buttonFlags,
 			Zotero.getString('zotero.preferences.search.rebuildIndex'),
+			null,
+			// Position 2 because of https://bugzilla.mozilla.org/show_bug.cgi?id=345067
 			Zotero.getString('zotero.preferences.search.indexUnindexed'),
-			null, null, {});
+			null, {});
 		
 		if (index == 0) {
 			Zotero.Fulltext.rebuildIndex();
 		}
-		else if (index == 1) {
+		else if (index == 2) {
 			Zotero.Fulltext.rebuildIndex(true)
 		}
 		
@@ -474,8 +476,8 @@ Zotero_Preferences.Search = {
 		var ps = Components.classes["@mozilla.org/embedcomp/prompt-service;1"].
 				createInstance(Components.interfaces.nsIPromptService);
 		var buttonFlags = (ps.BUTTON_POS_0) * (ps.BUTTON_TITLE_IS_STRING)
-			+ (ps.BUTTON_POS_1) * (ps.BUTTON_TITLE_IS_STRING)
-			+ (ps.BUTTON_POS_2) * (ps.BUTTON_TITLE_CANCEL);
+			+ (ps.BUTTON_POS_1) * (ps.BUTTON_TITLE_CANCEL)
+			+ (ps.BUTTON_POS_2) * (ps.BUTTON_TITLE_IS_STRING);
 		
 		var index = ps.confirmEx(null,
 			Zotero.getString('zotero.preferences.search.clearIndex'),
@@ -483,13 +485,14 @@ Zotero_Preferences.Search = {
 				Zotero.getString('zotero.preferences.search.clearNonLinkedURLs')),
 			buttonFlags,
 			Zotero.getString('zotero.preferences.search.clearIndex'),
-			Zotero.getString('zotero.preferences.search.clearNonLinkedURLs'),
-			null, null, {});
+			null,
+			// Position 2 because of https://bugzilla.mozilla.org/show_bug.cgi?id=345067
+			Zotero.getString('zotero.preferences.search.clearNonLinkedURLs'), null, {});
 		
 		if (index == 0) {
 			Zotero.Fulltext.clearIndex();
 		}
-		else if (index == 1) {
+		else if (index == 2) {
 			Zotero.Fulltext.clearIndex(true);
 		}