Thanks for your bug report, and for Lionel's analysis. A fix has been committed to Debian git and will appear in 5.11-2. For Maverick (and Lucid?) I will recommend Lionel's solution of removing the svg extension in the desktop file. This has to be done by refreshing debian/patches/50_driver_screensaver-properties-desktop.patch to not add the svg extension. Alternatively (like in Debian git) just drop that patch file altogether, since the StartupNotify setting it also adds, is of no use.
Thanks for your bug report, and for Lionel's analysis. A fix has been committed to Debian git and will appear in 5.11-2. For Maverick (and Lucid?) I will recommend Lionel's solution of removing the svg extension in the desktop file. This has to be done by refreshing debian/ patches/ 50_driver_ screensaver- properties- desktop. patch to not add the svg extension. Alternatively (like in Debian git) just drop that patch file altogether, since the StartupNotify setting it also adds, is of no use.