Digital BW, The Print

I have been getting black streaks on the backside of the paper, no 
impact on the print.  Somewhere I read,can't remember where,  that 
this dirty roller syndrome was peculiar to the Colorlife paper.  Has 
anyone heard of this & how much of a problem is it?  By running paper 
through my Epson 1280 printer it seems to clean it off.