[Plugin: NextGEN Gallery] Viewing images does not work.

This plugin has always worked without problems. But it does not anymore. Very often when switches to a new image, this happens: http://peecee.dk/upload/view/359035 The image appears on a new white page instead of in the photo album. Something is happening …

Are there others who are experiencing the same?
What is happening?

Thank you in advance.

http://wordpress.org/extend/plugins/nextgen-gallery/