This morning (15feb2013) Malwarebytes declared the following on my PC:
2013/02/15 08:23:40 -0500 DETECTION screamer044.exe Trojan.Backdoor.MRX QUARANTINE
2013/02/15 08:23:47 -0500 DETECTION PaceMaker plug-in install 2.6.exe Trojan.Backdoor.MRX QUARANTINE
2013/02/15 08:23:40 -0500 DETECTION screamer044.exe Trojan.Backdoor.MRX QUARANTINE
2013/02/15 08:23:47 -0500 DETECTION PaceMaker plug-in install 2.6.exe Trojan.Backdoor.MRX QUARANTINE