Index: src/wp-admin/includes/class-wp-press-this.php
===================================================================
--- src/wp-admin/includes/class-wp-press-this.php	(revision 31764)
+++ src/wp-admin/includes/class-wp-press-this.php	(working copy)
@@ -993,6 +993,9 @@
 			} else if ( ! empty( $data['_meta']['description'] ) ) {
 				$text = $data['_meta']['description'];
 			}
+			if ( substr( $text, -3, 3 ) == '...' ) {
+				$text = '';
+			}
 		}

 		$default_html = array(