UF Match not functioning in Drupal 4.7

System:
PHP: PHP 4.4.1
Drupal: HEAD (as of 3/24 at 2:30 Central Time)
MySQL: 4.1.14
CiviCRM: v1.4BETA rev4889M

Problem: Drupal users are not properly sync'd to CiviCRM users. Moreover, this bug introduces bad SQL which causes CiviCRM to error out most ungraciously.

This bug causes the following symptoms:
1. User edit pages fail with the error:
Array
(
[callback] => Array
(
[0] => CRM_Core_Error
[1] => handle
)

[code] => -2
[message] => DB Error: syntax error
[mode] => 16
[debug_info] => SELECT civicrm_contact.display_name, civicrm_email.email, civicrm_location.location_type_id, civicrm_location.id
FROM civicrm_contact
LEFT JOIN civicrm_location ON (civicrm_location.entity_table = 'civicrm_contact' AND
civicrm_contact.id = civicrm_location.entity_id AND
civicrm_location.is_primary = 1)
LEFT JOIN civicrm_email ON (civicrm_location.id = civicrm_email.location_id AND civicrm_email.is_primary = 1)
WHERE civicrm_contact.id = [nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7]
[type] => db_error
[user_info] => SELECT civicrm_contact.display_name, civicrm_email.email, civicrm_location.location_type_id, civicrm_location.id
FROM civicrm_contact
LEFT JOIN civicrm_location ON (civicrm_location.entity_table = 'civicrm_contact' AND
civicrm_contact.id = civicrm_location.entity_id AND
civicrm_location.is_primary = 1)
LEFT JOIN civicrm_email ON (civicrm_location.id = civicrm_email.location_id AND civicrm_email.is_primary = 1)
WHERE civicrm_contact.id = [nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7]
[to_string] => [db_error: message="DB Error: syntax error" code=-2 mode=callback callback=CRM_Core_Error::handle prefix="" info=" SELECT civicrm_contact.display_name, civicrm_email.email, civicrm_location.location_type_id, civicrm_location.id
FROM civicrm_contact
LEFT JOIN civicrm_location ON (civicrm_location.entity_table = 'civicrm_contact' AND
civicrm_contact.id = civicrm_location.entity_id AND
civicrm_location.is_primary = 1)
LEFT JOIN civicrm_email ON (civicrm_location.id = civicrm_email.location_id AND civicrm_email.is_primary = 1)
WHERE civicrm_contact.id = [nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 7]"]
)

---------------
Note the lack of a value in "WHERE civicrm_contact.id ="

2. When using the user sync option in civicrm/civicrm/admin/synchUser, the drupal users are erroneously matched to CiviCRM records, and the civicrm_uf_match table is not populated.

Sync output:

Synchronize Users to Contacts completed. Checked 3 user records. Found 3 matching contact records. Created 0 new contact records.

From mySQL (immediately following syncing process):
mysql> select * from civicrm_uf_match;
Empty set (0.01 sec)

I am unable to reproduce this bug on the sandbox, as editing the demo user's info does not fail.