pg-query()... kezako ?

Issue Summary

I can't get module "menu icons" to work.
When I enable the module, adding a menu element (whether link it to an image item or not) returns this error :

* warning: pg_query() [function.pg-query]: Query failed: ERREUR: erreur de syntaxe sur ou près de « attributes » LINE 1: UPDATE menu_links SET options = "a:2:{s:10:"attributes";a:1:... ^ in /usr/share/drupal6/includes/database.pgsql.inc on line 139.
* user warning: query: UPDATE menu_links SET options = "a:2:{s:10:"attributes";a:1:{s:5:"title";s:0:"";}s:4:"icon";a:2:{s:6:"enable";i:0;s:4:"path";s:0:"";}}" WHERE mlid = 361 in /etc/drupal/6/sites/all/modules/menu_icons/menu_icons.module on line 121.

my configuration :
drupal 6.12
PostgreSQL :8.4.0

module :
menu_icons-6.x-2.0.tar.gz

Any idea ?
Thanks :)