I have been using NextGen Gallery for the past 6 months with no issue
I recently upgraded to WordPress 3.2.1 and once doing so, NextGEN gallery caused a series of problems
1. the plugin will cause the post or page to only show in HTML / the visual section of the post will not be available at all.
2. my gallery will show the images one under another, normal function of the gallery are not available at all.
I have another site that I update and I upgraded that to 3.2.1 and the gallery is working no problem.
has anyone come across this?