A couple people have left comments saying they get an error message like the following when they try to install Vista in a VM:

"The instruction at 0x1fee7a6d referenced memory at 0x02b8bd0f.  The required data was not placed into memory because of an I/O error status of 0xc0000185."

I haven't seen this happen, but enough people have mentioned it that I thought it would be nice to start a dialog about it.  After all - that's what blogs are for, right?

======UPDATE=======

Darax asks a good question:

What software are you folks using to burn the ISO to a DVD?  Or if it's a Virtual DVD program what program?  Version would be helpful too.  

One perhaps odd sounding question-but what brand of media?

I'm increasingly of the opinion that this has to do with the installation media, whether it's a physical disc or a mounted ISO.  If you're having this problem, please answer Darax's questions.