Future of the Adobe SVG Viewer
A prerequisite for the Visual Composer design-time client is the installation of the Adobe SVG Viewer. Adobe doesn't provide any support for this viewer anylonger. Since January 1 2009 SAP is responsible for all support issues of the Adobe SVG Viewer. Nevertheless the download link is still available at Adobe web site .
If you are running the Visual Composer client on Microsoft Windows Vista, you should download and install the Adobe SVG Viewer for Microsoft Windows XP.