The blanks seem to have actually changed. In any case is now "up to 6x speed" it. It used to be 4x. On the loose leaf which is on the spindle above however is still 4x. And also the edge of the disc does not seem to be as smooth as before.
On my 10-er spindle there were only 9 blanks. A complaint seems to me a bit awkward, but you should keep this in mind.
I just did a BluRay burned (burner: LG BH10LS30) and it worked without any problems.
