The Arduino IDE 1.5.3 introduced some new features, such as support latest board Yun, or introduces new libraries and samples. But I found it is too buggy to use.

1. Compile code against Arduino Nano fails due to parameter mcu passed to avrdude is missing.

Reason:
The issue seems caused because the new IDE merged the menu items for Nano board. But for some reason, the configuration haven’t been updated accordingly.

Workaround:
Choose Arduino Duemilanove and Diecimila instead of Arduino Nano. Nano uses same chip as Duemilanove(ATmega328) and Diecimila(ATmega168), but uses a different PCB design. So the binary should be compatible.

2. Compile String(100, DEC) throws ambiguous matching error

Reason:
The issue is caused because the API signature updated to String(*, unsigned char), but constants are still declared as int.

Workaround:
Add force cast DEC, HEX, BIN to byte instead of int.