I've spent the last couple hours reading various posts in forum and still can't get it to work. I'm using a slight modification of Kubrick's theme. When I try to register the sidebar in the theme's function.php, with <?php if ( function_exists('register_sidebar') ) register_sidebar(); ?> and go to save it, I get Warning: Cannot modify header information - headers already sent by (output started at /home/altadena/www/www/wordpress/wp-content/themes/abc/functions.php:3) in /home/altadena/www/www/wordpress/wp-admin/theme-editor.php on line 55
The blog is at http://www.altadenabaptist.org/wordpress/ and I suspect that it has something to do with the path but don't know what to do to fix it.
Other problems too, but one thing at a time, and this seems to be the initial problem that the others build on.
Update: I edited it in Dreamweaver and reuploaded it and it seems to work as I can now see Widgets. So now, on to the next problem.
I activated the Flexo Archives widget so that I can get that long archives list cut down to years, but I see nothing different.