WP-prettyphoto fails with nextgen gallery Just a small black box thum opens up... is this something to do with pretty photo cache refresh i have been reading? Cold it be a plugin conflict a javascript conflict?
next gen settings within effects is rel="wp-prettyPhoto[1]"
I have modified the WP-PrettyPhoto 1.6.2 to work with WP 3.1.1 You can try it, download it from my site tarbak.com. As you can see my site use nextgen with wp-prettyphoto. I hope it helps.