I unzipped the zipfile, built core and gui, did ./run, but I get an error. What's the deal? Do I need Tiger? it chokes on this line in GURLHandler: "System.loadLibrary("GURL");"

The full error is:

java.lang.UnsatisfiedLinkError: no GURL in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java :1517)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:834)
at com.limegroup.gnutella.gui.GURLHandler.<clinit>(GU RLHandler.java:14)
at com.limegroup.gnutella.gui.Initializer.initialize( Initializer.java:106)
at com.limegroup.gnutella.gui.GUILoader.load(GUILoade r.java:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Nativ e Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Native MethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(De legatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.limegroup.gnutella.gui.Main.main(Main.java:36)