I know that codeIgniter turns off GET parameters by default.
But by having everything done in POST, don't you get annoyed by the re-send data requests if ever you press back after a form submission?
It annoys me, but I'm not sure if I want to allow GET purely for this reason.
Is it such a big security issue to allow GET parameters too?
When I first started working with CodeIgniter, not using GET really threw me off as well. But then I realized that you can simulate GET parameters by manipulating the URI using the built-in URI Class. It's fantastic and it makes your URLs look better.
Or if you really need GETs working you can put this into your controller:
parse_str($_SERVER['QUERY_STRING'], $_GET);
Which will put the variables back into the GET array.