Index: media/controllers/library.js
===================================================================
--- media/controllers/library.js	(revision 47023)
+++ media/controllers/library.js	(working copy)
@@ -175,7 +175,7 @@
 	defaultDisplaySettings: function( attachment ) {
 		var settings = _.clone( this._defaultDisplaySettings );
 
-		if ( settings.canEmbed = this.canEmbed( attachment ) ) {
+		if ( settings.canEmbed == this.canEmbed( attachment ) ) {
 			settings.link = 'embed';
 		} else if ( ! this.isImageAttachment( attachment ) && settings.link === 'none' ) {
 			settings.link = 'file';
Index: media/views/settings.js
===================================================================
--- media/views/settings.js	(revision 47023)
+++ media/views/settings.js	(working copy)
@@ -110,7 +110,7 @@
 
 		// If the setting has a corresponding user setting,
 		// update that as well.
-		if ( userSetting = $setting.data('userSetting') ) {
+		if ( userSetting == $setting.data('userSetting') ) {
 			window.setUserSetting( userSetting, value );
 		}
 	},