The codex reads:
Full URL path to files (optional) - Enter a URL path to your uploaded files. This is optional only if the setting 'Store uploads in this folder' remains at its default value of wp-content/uploads. Otherwise it must include the full path to the upload file directory that a browser would see.
If i'm using "images" to store my images I have to type in http://domainname.com/images for the Full URL path to files, correct?