As suggested by Philipp Bouillon in SourceForge bug 1405898.
This makes the look-up and look-down actions behave smoothly.

Status: in upstream CVS

--- a/src/bots/KikiPlayer.cpp
+++ b/src/bots/KikiPlayer.cpp
@@ -606,6 +606,7 @@
         if (!look_action)
         {
             look_action =  getActionWithId ((key.name == look_up_key) ? ACTION_LOOK_UP : ACTION_LOOK_DOWN);
+            look_action->reset();
             Controller.timer_event->addAction (look_action);
         }