Arduino error on launch (osx intel)

Hello all,

nick: where exactly did you find the RXTXcomm.jar file? I replaced the ibrxtxSerial.jnilib file with the one from processing, but I am not able to replace any RXTXcomm.jar file, since I cannot find it within the arduino package.

So when I start arduino and then go to the TOOLS-menue I get the following error-message:

java.lang.NoClassDefFoundError thrown while loading gnu.io.RXTXCommDriver

I am working on a Intel-Mac and have installed the latest ftdi drivers.

Any help will be much appreciated. Thank you,
-Helge