ALTER TABLE error when adding a viewreference

Hi, I 'm having problems with last (6.x-2.11 in this moment) version of the module.
When I add a viewreference field to a custom content type I get this error:
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user warning: BLOB/TEXT column 'field_pezzipubblicatimedium_arguments' can't have a default value query: ALTER TABLE content_type_medium ADD `field_pezzipubblicatimedium_arguments` LONGTEXT DEFAULT '' in \path\do\drupal\installation\includes\database.mysql-common.inc on line 298.
===
I can go on with the settings of the new field, but the arguments i want to pass to the query are not saved.

After checking the DB, I noticed that the column was not created. I then executed by hand the following query:
ALTER TABLE content_type_medium ADD `field_pezzipubblicatimedium_arguments` LONGTEXT

Now the arguments are correctly passed to the view and I get the desired result.

My configuration is:
* Windows XP
* Apache 2.0.59
* PHP 5.2.5
* Mysql 5.0.67
* Drupal 6.9

My guess is that something has to be changed in the code to have a compatibility with MySQL 5.0, but I do not know if the faulty module is really viewreference or CCK instead.