After a quick replace of the twitter-widget file, the widget returns this error message in between tweets :
Warning: preg_replace_callback() [function.preg-replace-callback]: Requires argument 2, ‘Array’, to be a valid callback in/%WP-homedirectory%/wp-content/themes/Fuji/includes/twitter-widget/twitter-widget.php on line 99
Warning: preg_replace_callback() [function.preg-replace-callback]: Requires argument 2, ‘Array’, to be a valid callback in/%WP-homedirectory%/wp-content/themes/Fuji/includes/twitter-widget/twitter-widget.php on line 100