Translation is not working fine with drupal 6.10 and 6.11

Hi there,

It seems there is a problem with the spanish translation and the latest versions of Drupal.

1) I haven't been able to install drupal 6.10 in Spanish. I get the white screen of death, whereas installing it in english it gives no problems.

2) I haven't been able to update a site in drupal 6.6 to drupal 6.10 or 6.11. When I upload the new version with the translation and I run cron after the update, it still said I had to update. Asking in drupal.org.es, someone told me to try this: update, erase drupal files, upload the new ones again and run again update.php. When I tried I got a white screen of death when going to update.php, and when going to the front page or the administration page this kind of errors:

Fatal error: Call to undefined function user_access() in mysiteindrupal/includes/menu.inc on line 2456
Fatal error: Call to undefined function node_load() in mysiteindrupal/includes/menu.inc on line 410
Fatal error: Call to undefined function user_access() in mysiteindrupal/includes/menu.inc on line 449

It seems something is wrong with menu.inc in the translation files.