I know that Windows (and Linux and everybody else) can use the Joliet extensions to ISO9660, and that there is another extension out there called Rock Ridge. However, does Windows restrict itself to those extensions, or are they using anything different/newer now?

Reason I ask is because, a couple of weeks ago, I had some issues reading a CDROM in Linux that was burned by Windows software. Didn't have any issues reading CDROMs in Linux burned by Linux software, so I was curious if Windows was perhaps using some new extensions.

I haven't known Windows to use any non-standard CD formats. But I have seen Windows programs do a poor job of closing the CD (or leaving a multisession CD open) in such a way that it works fine on that particular Windows machine, but not anywhere else.

You mean the udf format in newer windows maybe?

I may be wrong but I believe the old Roxio software cdrw was udf format also and would not read on windows unless Roxio was installed.

It was the udf version that caused the problems. I think if you have a 2.6.3 kernel you should be able to read any of them. Might check on that number.