When I add a specific subcategory to my query string on my search results page I can see the chosen refinements list and filter options for other categories, price ranges, etc. However if I only do a keyword search I do not see any filter options. How can I set my results page to show all available filters with just a keyword search?
Edited to add - here is the layout xml:
<catalogsearch_result_index translate="label"> <label>Quick Search Form</label> <update handle="page_two_columns_left" /> <reference name="root"> <action method="setTemplate"><template>page/1column.phtml</template></action> </reference> <reference name="left"> </reference> <reference name="content"> <block type="catalogsearch/layer" name="catalogsearch.leftnav" after="currency" template="catalog/layer/view.phtml"/> <block type="catalogsearch/result" name="search.result" template="catalogsearch/result.phtml"> <block type="catalog/product_list" name="search_result_list" template="catalog/product/list.phtml"> <block type="catalog/layer_view" name="filter" template="catalog/layer/view.phtml"/> <block type="catalog/product_list_toolbar" name="product_list_toolbar" template="catalog/product/list/toolbar.phtml"> <block type="page/html_pager" name="product_list_toolbar_pager"/> </block> <action method="setColumnCount"><count>3</count></action> <action method="addColumnCountLayoutDepend"><layout>empty</layout><count>6</count></action> <action method="addColumnCountLayoutDepend"><layout>one_column</layout><count>5</count></action> <action method="addColumnCountLayoutDepend"><layout>two_columns_left</layout><count>4</count></action> <action method="addColumnCountLayoutDepend"><layout>two_columns_right</layout><count>4</count></action> <action method="addColumnCountLayoutDepend"><layout>three_columns</layout><count>3</count></action> <action method="setToolbarBlockName"><name>product_list_toolbar</name></action> </block> <action method="setListOrders"/> <action method="setListModes"/> <action method="setListCollection"/> </block> </reference> </catalogsearch_result_index> Here is a screen shot of the page prior to any filters on the search: 
Here is one with a category filter added: 