Change this in file nextgen-gallery/view/gallery.php line 83
This line:
<a href="<?php echo $image->imageURL ?>" title="<?php echo $image->description ?>" <?php echo $image->thumbcode ?> >
To this:
<a href="<?php echo $image->imageURL ?>" title="<?php echo $image->alttext ?>" <?php echo $image->thumbcode ?> >
Now you see titles! Cheers!
