I got hit with a new Trojan this afternoon. It's called Smart Fortress 2012. I was running Firefox version 11.0 (no extensions), and my system is Win7 Home Premium. It's a false anti-spyware program. I was able to get rid of it (AFAIK) by booting into safe mode, running CCleaner to clear out the browser cache, and then running MalwareBytes in Chameleon mode to get rid of it. A second MBAM scan showed no infection. I'm now running Avira AV to check if it piggybacked something that MBAM didn't catch.