Just go to the Control Center / KDE Components / File association and then attach to image/svg+xml file type KSVGPlugin in the Embedding and Konqueror (and Karbon if you wish to edit SVG files) in General tab.
All should be well. Matěj Cepl -- Matej Cepl, http://www.ceplovi.cz/matej GPG Finger: 89EF 4BC6 288A BF43 1BAB 25C3 E09F EF25 D964 84AC 138 Highland Ave. #10, Somerville, Ma 02143, (617) 623-1488