This error only appears with certain debconf options. If you select mysql or postgresql without installing their client programs there will be an error. Since you can select one or the other, however, it is not appropriate to depend on either. Also, you can select a debconf option which uses neither, in which case there is no error. I suggest downgrading or closing this bug report.
Matt -- Matthew Johnson http://www.matthew.ath.cx/ -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]