Index: core/kernel/db/db_load_balancer.php
===================================================================
--- core/kernel/db/db_load_balancer.php
+++ core/kernel/db/db_load_balancer.php
@@ -426,6 +426,7 @@
 	{
 		if ( isset($this->connections[$i]) ) {
 			$conn =& $this->connections[$i];
+			$this->lastUsedIndex = $i;
 		}
 		else {
 			$server = $this->servers[$i];