When default search profile is set, creating PDF letter activity is assigned to incorrect activity id

In CRM/Contact/Form/Search.php, around line 618 in the preProcess() function there is:

if ($this->_ufGroupID == NULL &&
$config->defaultSearchProfileID != NULL
)

{ $this->_ufGroupID = $config->defaultSearchProfileID; }

That clause matches if you have set a defaultSearchProfileID.

Later in that function, we have:

if (!empty($this->_ufGroupID))

{ $this->set('id', $this->_ufGroupID); }

Therefore, if $config->defaultSearchProfileID is not null, then the form's id value is set to the id of the default search profile.

Then, in CRM/Contact/Form/Task/PDF.php, around line 69 in the preProcess function we have:

$this->_activityId = CRM_Utils_Request::retrieve('id', 'Positive', $this, FALSE);

The result, is that the PDF activity created has the activityId matching the profile id of the default search profile.

The result is one of two things:

• Either a fatal error due to a constraint violation (if there is not activity with the given id), or
• An activity is created with a mis-matched activity id (which is far worse because it creates inconsistent data). For an example see: http://drupal.demo.civicrm.org/civicrm/activity?atype=22&action=view&reset=1&id=1&cid=20&context=activity.

The activity should be a PDF Letter, but it has the subject line: "Subject for Membership Signup". that's because it was attached to the activity with ID 1 (which is the profile ID of Name and Address, which is the profile I set as the default search profile).

I'm fairly lost in the process - not sure exactly which code is wrong??