As I posted in my posterous account, all you have to do is make a small change in nggfunctions.php
On line 50:
$swfobject->add_flashvars( ‘file’, urlencode ( trailingslashit ( home_url() ) . ‘index.php?callback=imagerotator&gid=’ . $galleryID ) );
change to:
$swfobject->add_flashvars( ‘file’, urlencode ( trailingslashit ( site_url() ) . ‘index.php?callback=imagerotator&gid=’ . $galleryID ) );
Hope I helped!