Home Sharing Photos on Apple TV 2 Not Staying in Sync

I have successfully shared photos from my PC to my Apple TV via iTunes, by going to Advance > Choose Photos to Share. Slide shows work GREAT!

However, when I add new photos to that folder, they do not appear on my Apple TV. I have to go back into iTunes and re-select the folder to share in order to see them on the Apple TV.

• Is there a way to allow the folder to stay in sync?
• If not, can I specify how frequently the Apple TV checks for new photos?

This seems like a bug! Please help.