Index: src/wp-admin/js/updates.js
===================================================================
--- src/wp-admin/js/updates.js	(revision 38170)
+++ src/wp-admin/js/updates.js	(working copy)
@@ -249,7 +249,7 @@
 			wp.updates.queueChecker();
 		}
 
-		if ( 'undefined' !== typeof response.debug ) {
+		if ( 'undefined' !== typeof response.debug && 'function' === typeof window.console.log ) {
 			_.map( response.debug, function( message ) {
 				window.console.log( $( '<p />' ).html( message ).text() );
 			} );
@@ -1341,7 +1341,7 @@
 				break;
 
 			default:
-				window.console.error( 'Failed to execute queued update job.', job );
+				window.console.error && window.console.error( 'Failed to execute queued update job.', job );
 				break;
 		}
 	};
@@ -1930,7 +1930,7 @@
 					break;
 
 				default:
-					window.console.error( 'The page "%s" is not white-listed for bulk action handling.', pagenow );
+					window.console.error && window.console.error( 'The page "%s" is not white-listed for bulk action handling.', pagenow );
 					return;
 			}
 
@@ -1961,8 +1961,15 @@
 					action = bulkAction.replace( 'selected', type );
 					break;
 
+				case 'activate-selected':
+				case 'deactivate-selected':
+				case 'enable-selected':
+				case 'disable-selected':
+					// Known unsupported bulk actions.
+					return;
+
 				default:
-					window.console.error( 'Failed to identify bulk action: %s', bulkAction );
+					window.console.error && window.console.error( 'Failed to identify bulk action: %s', bulkAction );
 					return;
 			}