Fresh install of Moodle 2.1.1+ (downloaded 23.9.2011) on Ubuntu Oneiric (PHP 5.3.6, PostgreSQL 9.1).
After installation, first and only action taken is to try to create local account.
I am unable to update user profile page and user is not created.
Error reported is "Error reading from the database" and debug info is:

Debug info: ERROR: invalid input syntax for integer: ""
SELECT * FROM mdl_files WHERE contextid = $1 AND component = $2 AND filearea = $3 AND itemid = $4 ORDER BY id DESC
[array (
0 => '13',
1 => 'user',
2 => 'draft',
3 => '',
)]
Stack trace:

• line 394 of /lib/dml/moodle_database.php: dml_read_exception thrown
• line 232 of /lib/dml/pgsql_native_moodle_database.php: call to moodle_database->query_end()
• line 678 of /lib/dml/pgsql_native_moodle_database.php: call to pgsql_native_moodle_database->query_end()
• line 1122 of /lib/dml/moodle_database.php: call to pgsql_native_moodle_database->get_records_sql()
• line 1071 of /lib/dml/moodle_database.php: call to moodle_database->get_records_select()
• line 266 of /lib/filestorage/file_storage.php: call to moodle_database->get_records()
• line 127 of /lib/form/filepicker.php: call to file_storage->get_area_files()
• line 1593 of /lib/formslib.php: call to MoodleQuickForm_filepicker->exportValue()
• line 498 of /lib/formslib.php: call to MoodleQuickForm->exportValues()
• line 448 of /lib/formslib.php: call to moodleform->validate_defined_fields()
• line 545 of /lib/formslib.php: call to moodleform->is_validated()
• line 141 of /user/editadvanced.php: call to moodleform->get_data()

I have found that the only way to create user is to upload a picture in the same step when creating user.
If I create user using this workaround, I am later unable to edit user information. Said error appears every time I try to update user info UNLESS I upload some file as a picture in the same step.
Attached are the files containg debug information, php settings for moodle directory and picture of error page-