Check the second post above, there is a direct link to it. I downloaded it just to have it around, in case 4.3 fails. Yep...this solved my problem. I've just completed two ATRAC CD burns, and everything's back to "normal".
I just downloaded both the older v3.4 (if only to have it around) and the Px fix. Hopefully that'll solve MY issue of SS 4.3 suddenly not recognizing my burner. I'll be sure to recommend the fix to friends if and when they start having issues with SS 4.3 Paul