I see alot of other people have had this issue as well as myself. I have uploaded one file that is being flagged to virustotal. The results are below:
http://www.virustotal.com/file-scan/report.html?id=0e57739ef030e80f74a3cdff7e83c96788c868b9d12c0a456f282bffa3d8aca4-1319510006

I have taken the liberty to notify Eset to the issue by submitting the file to there lab and they are investigating. If anyone else is having problems please contact your AV vendor and submit the file so they can address the issue.
BTW: This particular file has been detected by 25 vendors since 2008!

Regards

I will see if I can do the same at my Anti-Virus vendor, F-secure. :)

It seems Eset has fixed the issue and removed the false detection.

you seem to be right. Yesterday eset NOD32 said its a virus, today it does not.

I recently took the time to notify the following vendors:
Avast
Avira
F-Secure
Panda

The following files were submitted:
STARTUP.EXE
CLIENT.EXE
RAYRUN.EXE
MAPPER.EXE

Please wait atleast 48 hours for removal of the detections.

I hate to necro this, but for some fucked up reason, BitDefender is now doing this to me. I've already sent the file over to them, but no changes, and it's getting on my nerves.

This is because the files actually contain the code for the CIH virus. This virus has no effect on modern systems, and I believe that they did actually stop the virus from running in the EXE, but the code for it is still there. GOG could replace the EXE with one missing the virus code, but they haven't for some reason. It's perfectly safe though, so don't worry.

Wikipedia says that all CIH does is a simple loop. I've had some really basic stuff being flagged as a virus when I was using Visual Studio with BitDefender, I think this is just another case of antiviruses being a little bit stupid.