Ah, surprised nobody noticed this before, but this is a bug in the template file.
It will be updated in next version or you can edit the query in template-events.php around line 23 to the following code:
$args = array(
'post_type' => 'event',
'posts_per_page'=> $posts_per_page,
'meta_key' => 'los_event_start', //this still need up to 3.1, but future enhancement on cards
'meta_query' => array( array(
'key' => 'los_event_start',
'value' => strtotime("today"),
'compare' => '>=',
'type' => 'numeric'
)
),
'orderby' => 'meta_value',
'order' => 'ASC',
'event_category' => $blog_cat,
'paged' => $page
);