[Plugin: Browse Content by My Solr Server] widget only displays the title in the sidebar…

I need to have a navigation widget in the sidebar that uses solr to do indexed searching by category, tag , author.

So I have typed in ‘wp_categories,wp_tags,wp_author’ in the Ordered comma separated attribute list. I also gave it the title ‘browse’

I have not changed the Template in the widget setup – it is still ‘search.php’

I am using theme ‘Twenty Eleven 1.2 by the WordPress team’

I have installed a local instance of solr server [version apache-solr-3.5.0] & installed the ‘solr for wordpress’ plugin [ version 1.1.1 ]. i have not made any changes to the plugin defaults. The plugin can ping the solr server ok & the server is working. For example when I type in text into the search box on the front page it is possible to do indexed faceted searches using the solr server. ie. when i type in text it offers words from the blog & then when you enter the word it displays a page: eg.

http://localhost/?s=cameras&submit=Search

and the page works as expected.

However the ‘browse content by my solr’ widget is not working.
The problem is the widget in the sidebar of the page shows the title I have entered ‘browse’ but nothing else.

http://wordpress.org/extend/plugins/browse-content-by-my-solr-server/