CodeIgntier and facebook developer, fb iframe help please.

[eluser]searain[/eluser]
OK, I have to add this line to MY_Controller

parse_str($_SERVER['QUERY_STRING'],$_GET);

I found it from some threads. If I remove this line, the facebook application sometimes works, sometimes doesn't (maybe cached).

It seems if I bring this line back, it always works.

Not quit clear about the CodeIgniter logic behind this. But it works. Anyone can explain?