As you can see in http://www.cdrlabs.com/forums/software-issue-t25190.html, the Power2Go, version 5, software supplied by HP with my notebook is rather brain dead when it comes to dealing with UDF, in particular with CD-RW, on the Matsushita drive I mention in the above referenced post.
Software works with Pioneer drive on same system.
Currently, only OS is Vista.
Is this a device driver issue for the Matsushita drive?
I guess when I install Win 7, likely next month, I'll fibd out if the drive has the same issues in Win 7.