I had same problem and I think I have solved it.
In boards.txt file, I had:
> ##############################################################
>
> diecimila.name=Arduino Duemilanove or Diecimila
>
> diecimila.upload.tool=avrdude diecimila.upload.protocol=arduino
>
> diecimila.bootloader.tool=avrdude diecimila.bootloader.low_fuses=0xFF
> diecimila.bootloader.unlock_bits=0x3F
> diecimila.bootloader.lock_bits=0x0F
>
> diecimila.build.f_cpu=16000000L diecimila.build.board=AVR_DUEMILANOVE
> diecimila.build.core=arduino diecimila.build.variant=standard
>
> ## Arduino Duemilanove or Diecimila w/ ATmega328
> ## --------------------------------------------- diecimila.menu.cpu.atmega328=ATmega328
>
> diecimila.menu.cpu.atmega328.upload.maximum_size=30720
> diecimila.menu.cpu.atmega328.upload.maximum_data_size=2048
> diecimila.menu.cpu.atmega328.upload.speed=57600
>
> diecimila.menu.cpu.atmega328.bootloader.high_fuses=0xDA
> diecimila.menu.cpu.atmega328.bootloader.extended_fuses=0x05
> diecimila.menu.cpu.atmega328.bootloader.file=atmega/ATmegaBOOT_168_atmega328.hex
>
> diecimila.menu.cpu.atmega328.build.mcu=atmega328p
>
> ## Arduino Duemilanove or Diecimila w/ ATmega168
> ## --------------------------------------------- diecimila.menu.cpu.atmega168=ATmega168
>
> diecimila.menu.cpu.atmega168.upload.maximum_size=14336
> diecimila.menu.cpu.atmega168.upload.maximum_data_size=1024
> diecimila.menu.cpu.atmega168.upload.speed=19200
>
> diecimila.menu.cpu.atmega168.bootloader.high_fuses=0xdd
> diecimila.menu.cpu.atmega168.bootloader.extended_fuses=0x00
> diecimila.menu.cpu.atmega168.bootloader.file=atmega/ATmegaBOOT_168_diecimila.hex
>
> diecimila.menu.cpu.atmega168.build.mcu=atmega168
>
> ##############################################################
I have replaced the line containing:
> diecimila.menu.cpu.atmega328.bootloader.extended_fuses=0x05
with:
> diecimila.menu.cpu.atmega328.bootloader.extended_fuses=0xFD
Everything is ok now.
I can install boot loader on an ATMEGA328P (with an usbasp programmer), and I can install sketchs after that (via usb serial).
I don't know if it's the best way to solve the problem, but it works. Hope this will help you, if not already solved.
Regards
Noury
