OS X says application failed to launch, check console. Console shows:
10/26/08 8:42:26 PM [0x0-0x20e20e].com.apple.JarLauncher[7063] java.lang.NoClassDefFoundError: org/apache/xerces/parsers/DOMParser
10/26/08 8:42:26 PM [0x0-0x20e20e].com.apple.JarLauncher[7063] at org.cybergarage.xml.parser.XercesParser.parse(XercesParser.java:114)
10/26/08 8:42:26 PM [0x0-0x20e20e].com.apple.JarLauncher[7063] at org.cybergarage.xml.Parser.parse(Parser.java:101)
10/26/08 8:42:26 PM [0x0-0x20e20e].com.apple.JarLauncher[7063] at org.cybergarage.upnp.Device.loadDescription(Device.java:373)
10/26/08 8:42:26 PM [0x0-0x20e20e].com.apple.JarLauncher[7063] at org.cybergarage.upnp.media.server.MediaServer.<init>(MediaServer.java:97)
10/26/08 8:42:26 PM [0x0-0x20e20e].com.apple.JarLauncher[7063] at org.cybergarage.mediagate.MediaGate.<init>(MediaGate.java:46)
10/26/08 8:42:26 PM [0x0-0x20e20e].com.apple.JarLauncher[7063] at org.cybergarage.mediagate.MediaGate.main(MediaGate.java:243)
10/26/08 8:42:31 PM com.apple.dyld[7066] update_dyld_shared_cache[7066] current cache invalid because /System/Library/Frameworks/QTKit.framework/Versions/A/QTKit has changed
10/26/08 8:42:35 PM com.apple.dyld[7066] update_dyld_shared_cache[7066] regenerated cache for arch=x86_64