response.html

Query arguments in the grid loop are now ignored.  This is because most uses of the grid 
loop were for displaying the main query (ex: blog posts on your blog page, category page...), 
and providing query arguments like 'posts_per_page' lead to 404 errors. Unfortunately this also 
means you can't use it for custom loops, like you were doing.

Take a look at the staff_do_grid_loop() function here: https://gist.github.com/4548000 
(I wrote it directly in the Gist so can't guarantee it's perfect).
<ol>
  <li>First you specify your query arguments, then create a new loop like this: $loop = new WP_Query ($args );</li>
	<li>Then you loop through this: if( $loop-&gt;have_posts() ): while( $loop-&gt;have_posts() ): $loop-&gt;the_post();</li>
	<li>Then you specify the markup for each post. I'm wrapping them in a div with either a class of "one-half first" or "one-half" depending on the post count. Inside this div, I have the title hyperlinked and the excerpt.</li>
	<li>Finally, once you're done with your loop run wp_reset_postdata(); . This reverts the $post object back to the original query's.</li>
</ol>
For more information:

<a href="http://www.billerickson.net/custom-wordpress-queries/">Custom WordPress Queries</a> (for custom queries)
<a href="http://www.billerickson.net/customize-the-wordpress-query/">Customizing the WordPress Query</a> (for the main page query)
<a href="http://www.billerickson.net/a-better-and-easier-grid-loop/">A better, easier grid loop</a> (this is for the main query, but the example I provided in this post takes the idea and applies it to a custom query)

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