Problem of v1.1 with wordpress 3.5

Hi
i know 1.1 supports only 3.4.2 but still i would like to ask for a solution for this Warning:

Warning: Missing argument 2 for wpdb::prepare(), called in /kunden/279571_14193/webseiten/verfassungsblog/wp-content/plugins/qtranslate-slug/qtranslate-slug.php on line 1857 and defined in /kunden/279571_14193/webseiten/verfassungsblog/wp-includes/wp-db.php on line 990

Warning: Missing argument 2 for wpdb::prepare(), called in /kunden/279571_14193/webseiten/verfassungsblog/wp-content/plugins/qtranslate-slug/qtranslate-slug.php on line 1857 and defined in /kunden/279571_14193/webseiten/verfassungsblog/wp-includes/wp-db.php on line 990

Warning: Cannot modify header information – headers already sent by (output started at /kunden/279571_14193/webseiten/verfassungsblog/wp-includes/wp-db.php:990) in /kunden/279571_14193/webseiten/verfassungsblog/wp-includes/class-wp-ajax-response.php on line 129

Thank you

https://www.ads-software.com/extend/plugins/qtranslate-slug/