For NextGen Gallery make sure you have an old copy before you update (same for all your plugins). I have had it break before either doing an wp update or it will not play well with other plugins.
This is what happened with the latest 3.2.1
I also have w3 Total Cache and the two did not play well together.
So right now I have 3.2.1 WP version with both Next Gen 1.8.3 (old) and w3 Total Cache (0.9.2.4) because if I update these two plugins, my NextGen gallery slideshow will not work and my site has lots of images. I just need to find another image gallery that functions like Next Gen.
I would suggest you definitely update your WP theme and if you see that anything is broken, to disable all plugins. Enable each one, one by one until you find the culprit. Either use the old version plugin (like me), find a new plugin, or have your developer fix those plugins.