Duemilanove OS X can't upload sketches (XP fine)

System: OS X 10.5.6 IDE Version 0015 USB driver FTDIUSBSerialDriver_v2_2_10-1.dmg ATMEGA328P-PU IDE settings are correct Tools > Board > Arduino Duemilanove w/Atmega 328 Tools > Serial > /dev/tty.usbserial-A70076ay (tried cu.usbserial as well)

Arduino board - purchased from ebay.

Upload works fine using XP via bootcamp.

Here's the console output: avrdude: Version 5.4-arduino, compiled on Oct 9 2007 at 11:20:31 url line removed

System wide configuration file is "hardware/tools/avr/etc/avrdude.conf" User configuration file is "/Users/MYUSERNAME/.avrduderc" User configuration file does not exist or is not a regular file, skipping

Using Port : /dev/tty.usbserial-A70076ay Using Programmer : stk500v1 Overriding Baud Rate : 57600 avrdude: Send: 0 [30] [20] avrdude: Send: 0 [30] [20] avrdude: Send: 0 [30] [20] avrdude: ser_recv(): programmer is not responding avrdude: stk500_recv(): programmer is not responding avrdude: Send: Q [51] [20] avrdude: ser_recv(): programmer is not responding avrdude: stk500_recv(): programmer is not responding

RS light blinks 3 times. I reckon thats the avrdude: Send: 0 [30] [20] bit.

What are the other serial ports you have available?