PHP 5.4 - PHP Warning: Illegal string offset 'field'

Hi,

On the "new" PHP 5.4 drupal generate this errors: Warning: Illegal string offset 'field' in DatabaseCondition->__clone() (line 1903 of /home/site/public_html/includes/database/query.inc).

Notice: Undefined variable: key in DatabaseCondition->compile() (line 1817 of /home/site/public_html/includes/database/query.inc).

Since php 5.4 is out and some people start to using it this is a critical issue.