diff --git a/chrome/content/zotero/xpcom/data/item.js b/chrome/content/zotero/xpcom/data/item.js
index 21ec403780..2d10b4ad3c 100644
--- a/chrome/content/zotero/xpcom/data/item.js
+++ b/chrome/content/zotero/xpcom/data/item.js
@@ -804,7 +804,7 @@ Zotero.Item.prototype.setField = function(field, value, loadIn) {
 		}
 		
 		// If existing value, make sure it's actually changing
-		if (this._itemData[fieldID] === value) {
+		if ((this._itemData[fieldID] + "") === (value + "")) {
 			return false;
 		}
 		
@@ -2813,6 +2813,7 @@ Zotero.Item.prototype.relinkAttachmentFile = function(file, skipItemUpdate) {
 		this._skipModTimeUpdate = true;
 	}
 	this.save();
+	this._skipModTimeUpdate = false;
 	
 	return false;
 }
@@ -2886,7 +2887,7 @@ Zotero.Item.prototype.__defineSetter__('attachmentLinkMode', function (val) {
 				+ "' in Zotero.Item.attachmentLinkMode setter");
 	}
 	
-	if (val === this._attachmentLinkMode) {
+	if (val === this.attachmentLinkMode) {
 		return;
 	}
 	
@@ -2938,7 +2939,7 @@ Zotero.Item.prototype.__defineSetter__('attachmentMIMEType', function (val) {
 		val = '';
 	}
 	
-	if (val == this._attachmentMIMEType) {
+	if (val == this.attachmentMIMEType) {
 		return;
 	}
 	
@@ -2993,7 +2994,7 @@ Zotero.Item.prototype.__defineSetter__('attachmentCharset', function (val) {
 		val = null;
 	}
 	
-	if (val == this._attachmentCharset) {
+	if (val == this.attachmentCharset) {
 		return;
 	}
 	
@@ -3041,7 +3042,7 @@ Zotero.Item.prototype.__defineSetter__('attachmentPath', function (val) {
 		val = '';
 	}
 	
-	if (val == this._attachmentPath) {
+	if (val == this.attachmentPath) {
 		return;
 	}
 	
@@ -3099,7 +3100,7 @@ Zotero.Item.prototype.__defineSetter__('attachmentSyncState', function (val) {
 				+ "' in Zotero.Item.attachmentSyncState setter");
 	}
 	
-	if (val == this._attachmentSyncState) {
+	if (val == this.attachmentSyncState) {
 		return;
 	}