$path_to_root = "../"; //line 1341 -> error access

hello

i've just install new update 1.5, but as the other (1.3, 1.4)
it make to me error : page down : can't access to ....

when i patch this line :
$path_to_root = "../"; //line 1341
to
$path_to_root = "./"; //line 1341

all work fine.

my configuration is :

drupal 6.10

native active module :
Book, Color, comment, contact, database logging, help, locale, menu, openid, profil, search, taxonomy, update status, upload.

adding module :
node access 6.x-1.5
comment notify 6.x-1.2
comment upload 6.x-1.0 A4
user import 6.x-1.2
Wysiwyg 6.x-1.1 ( with tinymce 3.2.2.3 )

is it because i've not the CCK module ?

thank