Just a quick list of some issues I experienced after I upgraded to WordPress 2.1 Ella:
Insert a link/image into your post won’t work: an old cached version of the Rich Text Editor’s JavaScript file causes the problem. Clear your browser cache to reload the new JavaScript file and everything works fine (found here).
Ultimate Tag Warrior (UTW 3.1415926) tags vanish after comments are added to a post: resolved here.
Same happens to GeoPress locations, they disappear after comments are posted. To fix it search for
function update_post($id)within the file geopress.php and add the following lines right after the opening curly bracket:
if (!is_admin()) return $id;
if (!isset($_POST['addr'])) return $id;
if (!isset($_POST['locname'])) return $id;(obviously the same issue as above with UTW tags)
In my case those fixes worked perfectly and I’m a happy WordPress user again.