as i said in an earlier post, that trojan does exist in the wild, so its always possible some users are actually infected. Its only been happening recently with trendmicro's housecall that some ppl are being told they are infected with it but when they check, they dont have any of the files or registry changes noted as being dropped by that trojan. Trendmicro has said their virus doctors are investigating to see if there is something triggering a false postive. Until someone gets a response from them with the results of their analysis, we can only speculate.
