I bought some ATtiny25 and one ATtiny85.
I use a straight parallel cable (type dapa in avrdude)
and has no problems programming ATmega168 and ATtiny85. But not one of now four tried ATtiny25 has worked (avrdude says -1 check connection and cable).
I checked with the seller and noone else has complained so i suppose they are ok. The ATtiny85 and tiny25 are pin-compatible så i just lift out the 85 that works and puts in the 25 and it does'nt work...
Anyone got a clue?