Konqueror & RPM downloads

Sometimes (often) when clicking on a web page to download an RPM, konqueror downloads the file to a temporary directory, showing progress in a separate window, and displays a page offering to show details of the RPM and to install using YaST. Other times the window just goes black, the file is fetched but there is no indication of where it (or if) it has been saved and no option to install or examine it. How do I configure konqueror to always offer to install the RPM rather than 'silently' transferring apparently to /dev/null?