I've been playing around with the PS/2 library on the Arduino playground, http://playground.arduino.cc/Main/PS2Keyboard
Reading keypresses works like a charm using the provided examples, but I can't seem to find how to read key up messages (break key events, those that start with F0), I'm not even sure break events are propagated by the library. Peeking at the code it seems they are properly detected but masked out? I'm useless at bit masking arithmetic apparently :p
Several internet searches haven't returned much, if you have a workaround or an explanation I'd love to hear from you. Thanks in advance!