I've used NextGen many times but never had this issue. I've created a gallery and embedded it into a post. The thumbnails show up fine but can not get the lightbox effect to work. In IE I get this error message:
Message: Object doesn't support this property or method
I've tried switching to the lightbox effect, no good. None of the others work either. I've disabled every plugin except this one and still no good (no conflicts).
You can view this at http://www.simcomedia.com/fraser/ under Galleries select Products. Again, thumbnails display. Also, if you switch to slideshow that works. What won't work is lightbox effect. Help?