Sorry, folders are not supposed to appear in the search results, as this is not yet properly handled in Photoblogger skin. I am just developing Tiger 3, and found this bug there too, which is now fixed. This folder inclusion might have infiltrated into other skins from Projector skin, which is capable of handling folders in the search results. I will fix this in other skins as soon as I release Tiger 3 beta for testing in a few days. Thanks for reminding me.