There is a topic on 2+2 (sorry I don't have the link) which talks about a bunch of people who were banned for using robots. Possibly from that. I was reading it a few weeks back.

It is common practice for sites to “hide” the details when these issues happen. I believe it is partially to prevent simular cheating, or giving the cheaters information on how the site detected them to begin with, and prevent them from developing anti-detection methods. I was playing DoN's on stars back when they uncovered the Chinese collusion rings and I was amazed at the lack of information they provided to the players affected. They just said here is your admin. credit you were affected by cheating.

ya ive actually have had prob 5 or more of these reimbursements lately and i tried email them to get more info but got nothing helpful back, these were a low stake tournys so who knows whats up with bigger ones