The new WordPress 3.8 was released today, and the first thing I did was go through and look for any new annoyances with this big new interface change (yet to know whether I like it yet).
The first thing I noticed was that the column options in the Dashboard area was removed, and was only allowing 1-4 options based off css media queries.
'max' =>; 2,
'default' =>; 1 ) );
add_action( 'admin_head-index.php', 'add_back_dashboard_columns' );
Too add the option back, and to set a max and a default option, use the function above and place in your themes functions.php file.