Hi!
I have looked for all the info in this page and many other forums trying to find a solution to my trouble.
I'm using Mac OS X Leopard 10.5.6 with a Arduino Duemilanove (ATMEGA328) with USB. I have installed all the drivers of the last package (0015) but when I try to execute the sample code to blink a LED (the one built-in in the pin 13) the program tells me this:
Problem uploading to board
Binary sketch size: 1000 bytes (of a 14336 byte maximum)
avrdude: stk500_getsync(): not in sync: resp=0x20
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x20