Digital BW, The Print

I stumbled across this on dpreview:

http://www.dpreview.com/forums/read.asp?forum=1000&message=3613378

Reading down through the thread it happens on Somerset and Hahnumule 
photorag with the matte black ink only, no one says if it's a problem 
with the 2200, but Epson has apparently confirmed the problem on the 
larger printers. If you go towards the bottom of thread to the post 
titled "conclusion" it gives a lot of facts. And it seems to happen 
with alternate RIPS.

I don't know anything about this personally, it jyust looked like 
something worthwhile to post.
Jim H.