I had set up NextGEN Gallery to replace an earlier photo album plugin, and it was working perfectly. I wanted to make a change to another plugin, and its author recommended I install Jetpack to facilitate the change. I did, made my change, and everything worked just fine (including NextGEN). This was prior to the WP 3.5.1 update. Following the update, NextGEN would display my albums, but when I clicked on one to display a gallery all I'd get was a blank page.
Following a suggestion made in another post reporting a similar problem, I disabled all of my plugins except NextGEN, and it worked properly again. I turned on the remaining plugins one by one, and it worked with all of them except Jetpack. I tested it several times, and it was consistent: NextGEN + Jetpack = fail, NextGEN - Jetpack = success.
(BTW, I found another way to make the change in the plugin that Jetpack was installed for in the first place...so I'll probably delete Jetpack from the site.)