Italics currently do not work in a post title, on the post page. They DO work on the category page.
In the WordPress Support forum, someone suggested this fix:
I'm not sure why its not printing out as italic. The index.php (homepage) and single.php are using the same code to display the title on the page.
The code it's using is:
<h1 <?php hybrid_attr( 'entry-title' ); ?>><?php single_post_title(); ?></h1>
Now, I went into content.php and changed:
<?php single_post_title(); ?>
<?php the_title(); ?>
which seems to have resolved the problem.
But when stargazer gets an update this is going to revert.