Just wanted to say I visited the Adobe forums looking something up and I got the same message, avast said there was a trojan infecting Adobe. Hopefully someone will see this thread, this is huge mistake that is going to cause major issues for people if it doesn't get fixed quickly. I highly doubt all these major corporations have this trojan, more likely a false positive.
Virus definitions: 120828-1
Program version: 7.0.1466