I've never heard that rumor but I'll go ahead and shoot it down at first sight
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
and BTW it was mis-molded, not mis-stamped. the former owners of Millennium were told of the issue and said "if Innova called them QJs they're QJs, stamp them as QJs". They couldn't care less about their discs.
Run numbers on QJs should be ignored, they're all but meaningless. There are three distinctly different runs stamped 1.6 ... and for most of its history the QJ was un-numbered. The only number that means something is 1.8, which was a wrong-mold run of maybe 1000 Q-Polaris early last year. I discovered this mistake at the source, before ANY were seen in retail.
The only other number that means something is 1.1, which isn't even stamped on the disc, and those are CE QJs that are better identified visually.
tl;dr:
QJ run numbers: ignore them.