in_array() expects parameter 2 to be array, boolean given in includes/file.inc on line 965.

When I try to import manually at http://example.com/import/ucsf_profiles_publications

I received following error message:
Download of http://example.com/ucsf_profiles/download/csv failed with code 403.

And watchdog reports errors as
in_array() expects parameter 2 to be array, boolean given in includes/file.inc on line 965.

That is the file_scan_directory() function.

I'll post a patch soon to fix this problem.

Issue occurred on a Drupal 6.25 instance.