the most important 404s and 403s.  This makes the watchdog data easier to
  use.  Improved consistency of the 'amdminister > logs' section.

  performance of drupal_is_denied().

- Patch #78105 by nicki: Since the new table header feature has been committed to cvs (http://drupal.org/node/76741), this patch is to demonstrate the new functionality of defining a table cell as a heading, by removing the custom theme theme_watchdog_event and replacing it with the standard theme_table on the watchdog event details node (admin/log/event/1234) as per Morbis Iff's suggestion.