mysqli_real_escape_string() expects parameter 2 to be string, array given

I'm reporting this on behalf of a customer:

---

I've been getting this error clearing the cache with drush on a local copy of the site -- "mysqli_real_escape_string() expects parameter 2 to be string, array given database.mysqli.inc" -- and traced it to the acquia_spi_menu() function in the acquia connector suite. 'access callback' should be a string not an array:

- 'access callback' => array('_acquia_spi_send_access'),
+ 'access callback' => '_acquia_spi_send_access',