I am getting this weird error message:

avrdude -c avr109 -p m168 -b 115200 -P /dev/cu.PL2303-00002006 -U flash:w:servotest.hex:a

Connecting to programmer: .
Found programmer: Id = "FDL v02"; type = S
    Software Version = 0.2; No Hardware Version given.
Programmer supports auto addr increment.
Programmer supports buffered memory access with buffersize=128 bytes.

Programmer supports the following devices:
    Device code: 0x35

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e9406
avrdude: safemode: Verify error - unable to read lfuse properly. Programmer may not be reliable.
avrdude: safemode: To protect your AVR the programming will be aborted

avrdude done.  Thank you.

Any help?

The day after that happened (today), I am getting this error message:

avrdude -c avr109 -p m168 -b 115200 -P /dev/cu.PL2303-00001004 -U flash:w:printf.hex:a

Connecting to programmer: .avrdude: butterfly_recv(): programmer is not responding
make: *** [printf-upload] Error 1

I am using a Mac (Snow Leopard 13" MacBook Pro). I can usually remedy this error by unplugging and replugging the programmer, but nothing works now.

Tell us more about the programmer. thx

It's the one included in the Nerdkit (the one on the circuit board).