Failure to install with Drupal 7 beta 2

Works well with beta 1 but I have just received these error messages when trying to install with beta 2 and CKEditor. I am not sure what they mean :
* Warning: preg_replace(): Compilation failed: unrecognized character after (? at offset 10 in drupal_load_stylesheet_content() (line 3502 of /var/www/vhosts/xxx.co.uk/httpdocs/drupal7/includes/common.inc).
* PDOException: SQLSTATE[HY000]: General error: 1366 Incorrect integer value: 'filtered_html' for column 'format' at row 1: INSERT INTO {wysiwyg} (format, editor) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1); Array ( [:db_insert_placeholder_0] => filtered_html [:db_insert_placeholder_1] => ) in wysiwyg_profile_overview_submit() (line 502 of /var/www/vhosts/xxx.co.uk/httpdocs/drupal7/sites/all/modules/wysiwyg/wysiwyg.admin.inc).