After a first time installation on Mac Os X 10.5.6 I have the same linker problem:
Uncaught exception in main method: java.lang.UnsatisfiedLinkError: /Applications/ARDUINO/arduino-0011/Arduino 11.app/Contents/Resources/Java/librxtxSerial.jnilib:
Any change of java versions (1.5/1.6 & 32/64 bit) has no effect.
Any ideas?