Reverted in 3.1. We’re trying again in 3.2.
If you were using
$wpdb->last_result, you will need to change it to
$wpdb->get_results() without a
$query argument, which does the same thing. Inside
wpdb, we’re now passing resources around, so the
last_result property (which was private and should not have been used) no longer exists.
On PHP5, we’re using a magic getter to return
wpdb->get_results() for you, but it’ll throw a deprecated warning. On PHP4, your code will cease to work.
Further reading: #12257.