If you like Inkscape (an open source alternative to Adobe Illustrator) and have a Mac with Leopard; you will figure that it after installation it will not work. It will say that font caching might take time, but never start. It’s because of a simple bug, with a simple solution. Just open a terminal (Applications/Utilities) and type this, followed by an enter;
After that it should start normally.
And a note: Latest snapshot doesn’t seem to work. Just grab the latest stable package.