Its one of the worst bugs found on the RC1, it was fixed on the SVN a fix will be released this friday with the RC2, Sorry ! :-(
To fix it manually, just:
Edit pandora_console/godmode/alerts/alert_list.php
===================================================================
--- trunk/pandora_console/godmode/alerts/alert_list.php 2009-10-21 20:25:26 UTC (rev 2048)
+++ trunk/pandora_console/godmode/alerts/alert_list.php 2009-10-26 11:17:25 UTC (rev 2049)
@@ -551,6 +551,7 @@
echo '<form id="add_action_form" method="post" class="invisible">';
print_input_hidden ('add_action', 1);
print_input_hidden ('id_alert_module', 0);
+$actions = get_alert_actions ();
print_select ($actions, 'action', '', '', __('None'), 0);
This means you need to add line with + in that place.