Error burning bootloader

Hi: Developemente environment: Mac OS 10.7.5 IDE Arduino 1.5.5 Hardware: Arduino Yun

I load "Blink" sketch normally with the boot loader and /dev/tty.usbmodem1d11 port. OK I try to load "Blink" sketch with AVRISP mkII (shift+load) but it fails: Arduino: 1.5.5 (Mac OS X), Placa:"Arduino Yún" Board at /dev/tty.usbmodem1d11 is not available Sketch uses 5.132 bytes (17%) of program storage space. Maximum is 28.672 bytes. Global variables use 153 bytes (5%) of dynamic memory, leaving 2.407 bytes for local variables. Maximum is 2.560 bytes.

I try to burn the boot loader with AVRISP mkII but it fails: Arduino: 1.5.5 (Mac OS X), Placa:"Arduino Yún" _**failed; _ *avrdude: verification error, first mismatch at byte 0x0000 * 0xfb != 0xcb* avrdude: verification error; content mismatch If i use IDE 1.5.4 it works ok. Ideas? :-))

Hi:
I have resolved the second question… the one about “burning boot loader”.
I have changed this line in the file “boards.txt”
yun.bootloader.extended_fuses=0xcb (0xcb instead 0xfb)
:-))

We made a mistake with the IDE 1.5.4 and it was corrected with 1.5.5 https://github.com/arduino/Arduino/commit/e745ed988fd5f011e444a775ba31b6bb0c3dc4ed#diff-4ead488680453362ffec01d74609315c

The right value for the fuses is indeed 0xfb