I can confirm exactly the same symptoms on OS X 10.2.5, both from the published English version as well as the one built from the CVS sources ( mentioned above ).
The Java bytecode verifier is not happy about a method arg's type. Must be mismatched jars being bundled together in this dist.
Error:
java.lang.VerifyError: (class: com/limegroup/gnutella/xml/LimeXMLDocument, method: initialize signature: (Lorg/xml/sax/InputSource
V) Incompatible object argument for function call