Well let's see, Vista does duplex sound, as a matter of fact I use it every day the games I play online in the games voip capability. Also it depends on if your sound card or hardware supports it. For the last year I have not had any issues with using any software on Vista Ultimate which is what i'm using as long as it's 32 bit. Some people are still stuck in the DOS days. I've seen people claim that Vista can't do this can't do that and all they are doing is repeating word of mouth. Heck i've seen most of the people who claim bad experiences with it, never even tried the OS. I still have a version of Pacterm 1.5 that runs stable as can be on Vista. So people unless you actually tried the operating system to see if it handled everything ok, because you will all get a different answer from every person you talk to especially those with biases about certain software from the get go.
R Collins