The layer I'm searching is indeed a feature service and not a map service.
Robert's esearch widget is great, like many of his widgets, but it has too many features that are unnecessary for my needs. I know I could edit the code to strip its features down, but I'm not a flash developer so that's uncharted territory for me.
If you look at my original post with the screenshot, you can see that the search results are being passed to the attribute table (w/o data) because a new tab becomes available. When I clear my search results, that tab goes away. So if the attribute table needs a feature service to show attributes, why does a new tab show up from the results of a search?