So, first, this is an excellent plugin. Fantastic! It was exactly what I needed.
Second, after installing and configuring it, I noticed two compatibility issues.
1) In WP 3.5.2, if WP Family Tree is active, there's an issue when adding media to a post. When you click the "add media" button, you can upload an image, and it shows correctly on the page, but the preview image in the media library is blank. I'm positive this is a compatibility issue because as soon as you deactivate WP Family Tree, the preview images in the media library work perfectly.
2) You can't drag the family tree on mobile devices. I tried viewing it on both an ipad and a Samsung S3, and on both devices the family tree shows up, but you can't drag it around.
Again, this is a great plugin, but if you ever have a chance to do something about these issues (or suggest workarounds for me) that would be great.
Keep up the good work!