I was able to fix it, too. I deactivated and deleted the plugin and downloaded the latest version. The install alerted me that I needed to set up a path to the imagerotator.swf file. A relative path didn’t work, but a hardcoded path did work. The file is located in wp-content/uploads/imagerotator, not in the nextgen plugin directory. I assume that my original problem was caused by an incorrect path.
I’m having a similar problem. I’ve been using the slideshow for 6 months without an issue. Now when I create a new page or post with the same slideshow, I can see the show when I preview the draft, but when I preview a published page or post, the slideshow just doesn’t show up. Fortunately, the original slideshow on my home page is still functioning.
I fiddled around with another slideshow plug-in, but would really prefer to stick with NextGen.
Katie