Hello, and many thanks for your work! I got the plugin to work well inside my admin world, the preview is elegant, but on a live sidebar the tabs display, but the content supposed to be under them will not become visible. You can see it on the right sidebar here: http://www.winonweb.net/
The content is just unordered lists of internal links, formatted correctly. Actually, the links are the same as in the top menu navigation (pixopoint which also use suckerfish, suckerfish css is embedded into my site CSS, if that has something to say).
Did you have any luck with your sidebartabs snot showing content?
I have an odd problem myself…
Sidebartabs works great in Firefox.. The default tab works fine in Explorer, but the second and third tab show empty when clicked.