Index: wp-admin/includes/class-wp-comments-list-table.php
--- wp-admin/includes/class-wp-comments-list-table.php
+++ wp-admin/includes/class-wp-comments-list-table.php
@@ -413,8 +413,11 @@
 
 			if ( 'spam' != $the_comment_status && 'trash' != $the_comment_status ) {
 				$actions['edit'] = "<a href='comment.php?action=editcomment&amp;c={$comment->comment_ID}' title='" . esc_attr__( 'Edit comment' ) . "'>". __( 'Edit' ) . '</a>';
-				$actions['quickedit'] = '<a onclick="commentReply.open( \''.$comment->comment_ID.'\',\''.$post->ID.'\',\'edit\' );return false;" class="vim-q" title="'.esc_attr__( 'Quick Edit' ).'" href="#">' . __( 'Quick&nbsp;Edit' ) . '</a>';
-				$actions['reply'] = '<a onclick="commentReply.open( \''.$comment->comment_ID.'\',\''.$post->ID.'\' );return false;" class="vim-r" title="'.esc_attr__( 'Reply to this comment' ).'" href="#">' . __( 'Reply' ) . '</a>';
+				
+				if ( !empty( $post ) ) {
+					$actions['quickedit'] = '<a onclick="commentReply.open( \''.$comment->comment_ID.'\',\''.$post->ID.'\',\'edit\' );return false;" class="vim-q" title="'.esc_attr__( 'Quick Edit' ).'" href="#">' . __( 'Quick&nbsp;Edit' ) . '</a>';
+					$actions['reply'] = '<a onclick="commentReply.open( \''.$comment->comment_ID.'\',\''.$post->ID.'\' );return false;" class="vim-r" title="'.esc_attr__( 'Reply to this comment' ).'" href="#">' . __( 'Reply' ) . '</a>';
+				}
 			}
 
 			$actions = apply_filters( 'comment_row_actions', array_filter( $actions ), $comment );
@@ -478,6 +481,9 @@
 	function column_response( $comment ) {
 		global $post;
 
+		if ( empty( $post ) )
+			return;
+
 		if ( isset( $this->pending_count[$post->ID] ) ) {
 			$pending_comments = $this->pending_count[$post->ID];
 		} else {
Index: wp-includes/capabilities.php
--- wp-includes/capabilities.php Base (BASE)
+++ wp-includes/capabilities.php Locally Modified (Based On LOCAL)
@@ -961,8 +961,10 @@
 	case 'delete_post':
 	case 'delete_page':
 		$author_data = get_userdata( $user_id );
-		$post = get_post( $args[0] );
 
+		if ( ! $post = get_post( $args[0] ) )
+			break;
+
 		if ( 'revision' == $post->post_type ) {
 			$post = get_post( $post->post_parent );
 		}
@@ -1011,8 +1013,10 @@
 	case 'edit_post':
 	case 'edit_page':
 		$author_data = get_userdata( $user_id );
-		$post = get_post( $args[0] );
 
+		if ( ! $post = get_post( $args[0] ) )
+			break;
+
 		if ( 'revision' == $post->post_type ) {
 			$post = get_post( $post->post_parent );
 		}
@@ -1060,8 +1064,10 @@
 	case 'read_post':
 	case 'read_page':
 		$author_data = get_userdata( $user_id );
-		$post = get_post( $args[0] );
 
+		if ( ! $post = get_post( $args[0] ) )
+			break;
+
 		if ( 'revision' == $post->post_type ) {
 			$post = get_post( $post->post_parent );
 		}
@@ -1099,7 +1105,10 @@
 	case 'edit_post_meta':
 	case 'delete_post_meta':
 	case 'add_post_meta':
-		$post = get_post( $args[0] );
+
+		if ( ! $post = get_post( $args[0] ) )
+			break;
+
 		$post_type_object = get_post_type_object( $post->post_type );
 		$caps = map_meta_cap( $post_type_object->cap->edit_post, $user_id, $post->ID );
 
@@ -1115,7 +1124,10 @@
 		break;
 	case 'edit_comment':
 		$comment = get_comment( $args[0] );
-		$post = get_post( $comment->comment_post_ID );
+
+		if ( ! $post = get_post( $comment->comment_post_ID ) )
+			break;
+
 		$post_type_object = get_post_type_object( $post->post_type );
 
 		$caps = map_meta_cap( $post_type_object->cap->edit_post, $user_id, $post->ID );