It looks like you've reduced the payout multipliers that are displayed, but not changed the "how it works":
From
http://btcdice.com/howitworks.html :
You place a bet by sending bitcoins to one of the addresses listed in the 'Games' table. BTC Dice sees this, evaluates a win or loss and generates a return transaction. If you lose, we return your bet times 0.005 less house percent, or 0.00000001, whichever is greater. If you win, your bet is multiplied by the prize multiplier, the house percentage is subtracted, and that amount is sent back.
Do you still subtract the house percentage after multiplying by the multiplier?
What about when the player loses? Do you still subtract the house percentage then too?