domain redirect

I found that the issue is my theme… every time I activate it and then change anything on my blog or save anything my page redirects to the blank page. I tried the same on my local installation but everything is working fine, not sure what the error is. Any pointers?

I created my own theme. I found the issue to be with the functions.php file

<?php
/**
* simple functions and definitions
* The first function, scratch_setup(), sets up the theme by registering support
* for various features in WordPress, such as post thumbnails, navigation menus, and the like.
* @package rohinbhargava
* @subpackage thoughtsunbound
* @since scratch 1.0
**/
/** Tell WordPress to run scratch_setup() when the 'after_setup_theme' hook is run. **/
add_action('after_setup_theme','scratch_setup');
if (!function_exists('scratch_setup')) :
	function scratch_setup() {
        // This theme styles the visual editor with editor-style.css to match the theme style. add_editor_style();
        // Post Format support.
        add_theme_support('post-formats', array('aside', 'chat', 'gallery', 'image','link', 'quote', 'status', 'video', 'audio'));
        // This theme uses post thumbnails
		if (function_exists('add_theme_support')) {
		add_theme_support('post- thumbnails');
		set_post_thumbnail_size(480, 320, true); }

		add_image_size('scratch-potrait', 960, 1280, false);
		add_image_size ('scratch-landscape', 960, 640, false);

        // Add default posts and comments RSS feed links to head add_theme_support('automatic-feed-links');
        //This theme uses wp_nav_menu() in one location.
        register_nav_menus(array('primary' => __('Primary Navigation','scratch'), ));
} endif;

$prefix = 'thub_';
global $meta_boxes;
$meta_boxes = array();

function scratch_content_nav( $nav_id ) {
	global $wp_query;?>
<nav id="<?php	echo $nav_id;?>">
	<?php if ( $wp_query->max_num_pages > 1 ) :?>
	<h3 class="assistive-text"><?php _e('Post navigation', 'scratch');?></h3>
	<?php next_posts_link(__('<span class="meta-nav nav-previous">&larr; Older posts</span>', 'scratch'));?>
	<?php previous_posts_link(__('<span class="meta-nav nav-next">Newer posts &rarr;</span>', 'scratch'));?>
	<div class="clear"></div>
	<?php endif; ?>
</nav><!-- #nav-above -->
<?php }?>

<?php function scratch_post_nav( $nav_id ) {
	global $wp_query; ?>
	<nav id="<?php	echo $nav_id;?>">
		<h3 class="assistive-text"><?php _e('Post navigation', 'scratch');?></h3>
		<?php previous_post_link( '%link', '<span class="meta-nav nav-previous">&larr;</span> %title' )?>
		<?php next_post_link( '%link', '<span class="meta-nav nav-next">%title  &rarr;</span>' )?>
		<div class="clear"></div>
	</nav><!-- #nav-above -->
<?php } ?>

Can you help find the issue with the above content

A plugin ‘Per Post Scripts & Styles’ seems to be the culprit for now. I will check and revert back if the issue re-occurs.

Also is it possible that the issue is caused by a memory issue?