I'm having problems with NextGen since I moved my site from a subdirectory to the root. (Ie. from http://www.mysite.com/wp to http://www.mysite.com like it's described here: http://codex.wordpress.org/Giving_WordPress_Its_Own_Directory).
After that, my galleries disappeared from my pages. When I click on the button in the text editor (NextGen Gallery – attatch to Post) - the pop up is blank except for the Nextgen Gallery logo.
I checked in text mode and saw that the galleries referred to the old path (ie. http://www.mysite.com/wp/...), so when I updated this, the galleries showed up again.
But I can still not get the button (NextGen Gallery – attatch to Post) to work. It is still blank.
I have resaved the permalinks.
Other pages, images, and menus are working fine.
I can see my galleries in the "manage galleries" section and I can upload images here. But I cannot put galleries on any pages, probably because NextGen gets the paths wrong. How han I fix this? I'm using NextGen 2.0.40.
Many thanks for a great plugin!