Thanks for the advice about short tags; I'll go through all my scripts and change them shortly.
However, the bit that you pointed out, the bit lacking 'session_start()', wasn't the bit I'm refferring to. When you try and log in, it dies with the message "Login Failure: An error occured, please verify your username and password are correct."
This comes from the bit
$get_user = mysql_query("SELECT * FROM `pet_game` WHERE 'username' = '$name' AND 'password' = '$pass'");
$q = mysql_num_rows($get_user);
if(!$q)
{echo("Login Failure: An error occured, please verify your username and password are correct.");}
else
{