Yup, it's always worked in every site I've tried it on until recently. I installed the plugin from within WordPress, usually I've downloaded it and installed it manually, but never for any reason, I didn't customize anything, I just did it that way.
The site it doesn't work on doesn't have a sidebar. The only change was the installation method, and this is a newer version than I have running on anything else. It even works on other blogs I have running on the same server.
I suppose I could just copy the folder from the earlier version and use it in the new site. I'm not doing anything complicated, just posting galleries.