It would make sense for tooltips on slides mouse over to show the title of the post (slide) and not the image title as set when uploading the image.
Therefore I'd suggest changing line 109 in includes/meteor-slideshow.php from:
<a href="<?php echo get_post_meta( $post->ID, "slide_url_value", $single = true ); ?>" title="<?php the_title(); ?>"><?php the_post_thumbnail( 'featured-slide') ); ?></a>
to:
<a href="<?php echo get_post_meta( $post->ID, "slide_url_value", $single = true ); ?>" title="<?php the_title(); ?>"><?php the_post_thumbnail( 'featured-slide', array('title' => get_the_title()) ); ?></a>
I think this is reasonable, isn't it?