I use now the newest WP 3.4 and AddQuicktag in newest version, too. Since updating my WP I get in the settings of AddQuicktag this error:
Warning: array_multisort() [function.array-multisort]: Array sizes are inconsistent in /home/www/web346/html/websites/wp-content/plugins/addquicktag/inc/class-settings.php on line 205
The Quicktags itself are working!
Just to let you know ...