Why are atribute advances the only thing you can purchase with xp that are in multiples of 50 and not multiples of 100. Its really frustrating (imho) and seems out of place in many ways. Ok, Im done and feel better =-)

If you take alternate career ranks, elite advances from your missed rank are suggested to cost +50 xp.

Contacts also can cost in the 50XP numerals as can any elite advance the GM desires.

Ah ha! I just hated having that 50xp hanging there after leveling and such. I know its trivial and nit-picky.