All of a sudden, one of my search systems (SS 2.3.1) has started doing this. Nothing has changed on the site for literally months. I have found one post in these forums from 2 years ago with the exact same problem, however noone responded to the guy.

Full error:
[Warning] Missing argument 2 for Page_Controller::results(), called in /home/zanzomedia/site/sapphire/core/control/Controller.php on line 162 and defined
GET /home/results?formController=home%2F&executeForm=SearchForm&Search=test&action_results.x=16&action_results.y=7&action_results=Go

Line 126 in /home/zanzomedia/site/mysite/code/Page.php
Source

117       );
118       
119       $actions = new FieldSet(
120          new FormAction('results', 'Search')
121       );
122       
123       return new SearchForm($this, "SearchForm", $fields, $actions);
124    }
125    
126    function results($data, $form){
127       $data = array(
128          'Results' => $form->getResults(),
129          'Query' => $form->getSearchQuery(),
130          'Title' => 'Viva Expeditions Search Results'
131       );
132       

Trace

* Page_Controller->results(HTTPRequest)
Line 162 of Controller.php
* Controller->handleAction(HTTPRequest)
Line 107 of RequestHandler.php
* RequestHandler->handleRequest(HTTPRequest)
Line 122 of Controller.php
* Controller->handleRequest(HTTPRequest)
Line 28 of ModelAsController.php
* ModelAsController->handleRequest(HTTPRequest)
Line 277 of Director.php
* Director::handleRequest(HTTPRequest,Session)
Line 121 of Director.php
* Director::direct(home/results)
Line 115 of main.php

Any ideas what this error pertains to and why it would appear for no reason? The code is straight out of the tutorial, although the form is hardcoded.