I used to play a lot at internet casinos, and did quite a bit of due diligence. I hace concluded that they are not fixed, at least those associated with the big established books. Do you think if Pinnacle attached themselves to a casino that it would be rigged? I think not. It all comes down to who you are doing business with. Also, one should remember that the odds are against you anyway, so why would most need to bother tampering with the software?