I'm a WP newbie [WP 3.2.1, Suffusion Theme 3.8.2] developing a "scholarly" site that needs a lotta custom info in a variable second sidebar.
After trying at least half a dozen plug-ins to handle this task, Speck's "WordPress Custom Sidebar" is the first to work perfectly for me. What a Eureka Moment!
The one thing that didn't work at first was: I didn't edit [delete the built-in text] and then publish the "Default Sidebar" (who knew?). So the only custom sidebar I had made at the time was displayed on ALL pages with two theme sidebars because the "default" (blank) option was not available in the drop-down options.
Hoping this tip helps you or Someone Else Out There who tries this FABULOUS plug-in! Check out the super-spiffy result here: