I've just noticed that the manufacturer's ID does not show up (via command-I) for some discs on my iMac w/MATSHITA DVD-R UJ-85J and Toast 7.1.2 while the info was correctly displayed with Toast 7.1. The discs in question are TYG03.
The same has happened to my eMac with a Pioneer DVR-110D which I have also just upgraded to 7.1.2.