sqlite: error adding user

When I try to add a user, I get the following messages:
* Notice: Undefined variable: new_value in DatabaseConnection->nextId() (line 1161 of /home/www/d7/httpdocs/includes/database/database.inc).
* Error saving user account.
I'm on
fresh D7-dev installation, no modules except core
sqlite(!)
php 5.2.6
Apache 2.2.13

Don't know if it really depends on sqlite, wann't able to test with mysql.