path_redirect_delete() causing errors when loading "refresh" link for a FeedAPI node

When I tried to refresh a FeedAPI node, I get a PHP error similar to "cannot use [] operator on string in line 316 of path_redirect.module".

I fixed this error by adding the following code to path_redirect_delete():

<?php
foreach ($where as $key => $value) {
if (is_string($value)) {
// BEGIN ADDITION
if(is_string($args)) {
$args = array();
}
// END ADDITION
$args[] = $value;
$where[$key] = $key .' = '. (is_numeric($value) ? '%d' : "'%s'");
}
}

Why path_redirect_delete() is being called on this page, however, is a mystery to me.