QTR-Quadtone RIP

Hey everyone. I'm getting a paper white bug. When printing diptic/triptic images (anything with 100% white in the image file) from CS5 on Snow Leopard 10.6.7 it prints about 1% ink in there instead of nothing. It is pretty hard to see but noticeable if you look close.

I am using both Piezography (K7 Epson 4000) and K3 (4800) and the same thing happens. When printing without a profile (Adobe Color Utility) or with Adobe RGB, 100% white is not printed.

So this looks like a bug in how CS5 and CreateICC profiles interact in the most recent incarnation. I did not notice this until now because I had not seen triptics coming out the printer since last year in version 2.6 days and back then it was all fine.

Any word?

All the best,
Walker