By default, it uses .blog-sidebar sidebar css class under “Sticky Class” setting field and that should be modified for different themes to make it work. Don’t forget this, it’s a mandatory field.
Plugin is localized (multi language support) and responsive (as far as your theme is).
Advancement of this simple plugin is that increases usability of your WordPress site since sidebar is available to the user all the time.
Plugin Home + Demo URL: http://wordpress.transformnews.com/plugins/mystickysidebar
No screenshots provided