Version 3.4 now requires explicit post parameter

If you use a simple post id in a link e.g. https://www.example.com/1234, there’s a subtle change in 3.4 that will take you to the 404 page.

You’ll have to change the link to become: www.example.com/?p=1234

Why would anybody want to use such a link? I’ve seen it very commonly quoted as part of a solution to add a dropdown list of attached images for a post.

<?php
				$args = array(
					'numberposts'     => -1,
					'orderby'         => 'menu_order',
					'order'           => 'ASC',
					'post_type'       => 'attachment',
					'post_parent'     => $post->ID,
					'post_mime_type' => 'image'
				);
				$image = get_posts($args);
				if($image) { ?>
			 		<select name="ar-images" style="width:100%;" onchange="window.location='<?php echo home_url("/?p="); ?>'+this.value;">
						<option value="" <?php selected($custom["ar-images"][0], ""); ?>>View images</option>
				<?php foreach($image as $key => $data) : ?>

						<option value="<?php echo $data->ID; ?>" <?php selected($custom["ar-images"][0], $data->ID); ?>><?php echo basename ( get_attached_file( $data->ID ) ); ?></option>

					<?php endforeach; ?>
					</select>
				<?php }
				?>

The original code has home_url("/") which now has to be home_url("/?p=")