From my understanding, the 5 default widgets seen in theme preview are put there by the system for the purpose of previewing.
I don’t think it matters (for the check of your theme for inclusion into the directory) what you do with ‘default’ widgets.
review:
http://developer.wordpress.com/themes/
http://codex.wordpress.org/Theme_Development_Checklist
Thread Starter
obert
(@obert)
Not sure: I assume that one of my theme shows double searchform on theme preview, while I had tried to move the searchform from the sidebar to another place of the site.