Jeff Greenberg wrote:

I hook menu with an item $items['admin/....'] and give it a page callback of drupal_get_form and the page arguments being the function in my module that defines the form. It's defined as a normal menu item.

I click the menu item and up comes the form. So far everything as expected. What -isn't- expected is that in looking at the page source, the action for both this form, and the search form, are now both the path for this form.

That's normal. The action for any form is always the current page, unless someone sets $form['#action'] explicitly. This works, because when you submit the form (your form, or the search form) back to the same URL, drupal_get_form() gets called again for that form, which in turn checks if the form has been submitted, and handles the submission if so. At one point, the search form itself did explicitly set #action to work around a bug - http://drupal.org/node/67648 - but this was eventually removed in favour of a different fix. -john