Lightbox self disables

I have woocommerce running with the function theme, and for some reason when I enable the lightbox for the product gallery images the setting will be set properly, and I may get one refresh of the product page where the lightbox works, and on the next refresh it won’t work any more.

When I return to the settings page the “Enable Lightbox” option is unchecked… I check and save the options… and the cycle continues.

There are no other admins logged in that could be changing it… any ideas?

Thanks

http://ww.wp.xz.cn/extend/plugins/woocommerce/