4th decimal place for non jpy pairs = pip. 2nd decimal place for jpy pairs. The 5th (and 3rd) decimal places are just fractional pips that have only recently become popular.
FXCM quotes to 5 decimal points. The 4th digit is a whole pip and the 5 digit is a fractional pip (1/10th of a pip). So a movement from 1.34881 to 1.34397 that is 48.4 pips.
Fractional pip pricing should reduce bid/ask spreads.