"Undefined index" errors

Below is the text of forums posts http://forum.civicrm.org/index.php?topic=21281 and http://forum.civicrm.org/index.php/topic,21282.0.html

When visiting user/124/edit/Name%20and%20Address on a D7/C4.0.5 site I get:

Code:
Notice: Undefined index: 1 in CRM_Core_BAO_UFGroup::setProfileDefaults() (line 1993 of /home/xxx/www/www/sites/all/modules/civicrm/CRM/Core/BAO/UFGroup.php).

I fixed this by adding isset here:

Code:
if (isset( $value['phone'][$phoneTypeId]) ) {

On a D7/C4.0.5 site when registering for a free event with a profile I get these messages:

Code: [Select]
Notice: Undefined index: amount_level in CRM_Event_Form_Registration->addParticipant() (line 873 of /home/xxxxxxx/www/www/sites/all/modules/civicrm/CRM/Event/Form/Registration.php).
Notice: Undefined index: 15 in CRM_Activity_BAO_Activity::addActivity() (line 1603 of /home/xxxxxxx/www/www/sites/all/modules/civicrm/CRM/Activity/BAO/Activity.php).
Notice: Undefined index: amount in CRM_Event_Form_Registration->confirmPostProcess() (line 775 of /home/xxxxxxx/www/www/sites/all/modules/civicrm/CRM/Event/Form/Registration.php).
Notice: Trying to get property of non-object in CRM_Event_Form_Registration->confirmPostProcess() (line 777 of /home/xxxxxxx/www/www/sites/all/modules/civicrm/CRM/Event/Form/Registration.php).
Notice: Undefined variable: registerByID in CRM_Event_Form_Registration_Register->processRegistration() (line 1155 of /home/xxxxxxx/www/www/sites/all/modules/civicrm/CRM/Event/Form/Registration/Register.php).

I was able of course to eliminate them by adding a bunch of isset() or is_object() checks but I think there is a bug here...