I seem to be having the same problem discussed in this thread:
http://arduino.cc/forum/index.php/topic,28376.15.html
I'm running Arch Linux
uname:
2.6.38-ARCH #1 SMP PREEMPT Wed Mar 30 08:47:36 CEST 2011 x86_64 AMD Phenom(tm) 9850 Quad-Core Processor AuthenticAMD GNU/Linux
My problem is that when I try to follow the link to get instructions on how to put the UNO info DFU mode, it says that I don't have access to that forum. I'm wondering if there is more up-to-date information on this issue. My UNO is brand new, so I would have guessed that the newer firmware would already be on it, so perhaps I am having a different issue.
