Satoshidice shows multiplier less the house percent. I show multiplier prior to house percent.
Your help page at
http://btcdice.com/howitworks.html says:
If you win, your bet is multiplied by the prize multiplier and that amount is sent back.
But that's not correct. If you win, your bet is multiplied by the prize multiplier, then the house edge is subtracted, and that amount is sent back.
It would be best if you showed the actual multiplier the user gets. i.e. take the house edge off the prize multiplier before stating it. That way people can compare your odds with SD's to easily see which is better odds.
For example, on "lessthan 16000", instead of saying the payout is "4.096x", calculate 4.096*(1-edge/100):
>>> 4.096 * (1-1.650/100)
4.028416
and state that the payout is 4.028x.
That way people can make a direct comparison with SD's quoted multiplier of 4.003x.