Updating this morning my local moodle 1.7.1installation with daily release I got this two warning. It was since Feb. 15 I didn't upgrade my local copy. So the bug was added in the last 11 days.
Warning: main(../../config.php): failed to open stream: No such file or directory in /Users/daniele/Sites/moodle17/mod/lams/lib.php on line 4
Warning: main(): Failed opening '../../config.php' for inclusion (include_path='.:/usr/local/php/lib/php') in /Users/daniele/Sites/moodle17/mod/lams/lib.php on line 4