You can use the programmer in two basic ways – using the on-board ZIF socket, or using the 6 or 10-pin ICSP headers. The ZIF socket is for ATtiny and ATmega microcontrollers in aDIP package,and the ICSP headers are for programming a microcontroller on a target PCB that has an ICSP pr...
standard-sized Arduino boards, such as Duemilanove and UNO have SPI signals routed to pins 11-13 in addition to ICSP connector, therefore shields using pins 11-13 combined with standard-sized Arduinos will interfere with SPI. INT and