I run a 40" Heidelberg sheetfed. Endurance has been our house sheet since I've been working at this shop. I've been getting a LOT of hickies that appear to be paper coating. I've changed inks, even tried a reduced tack set. no help. Yellow and red seems to be affected the most. You can easily see the rollers in the yellow have a lot of white specks on them. It's almost like endurance changed their coating, or we just got a really dirty lot (80,000 sheets). Ran 100# Endurance gloss cover today and same problems, just as bad if not worse than the text. Stoping constantly to clean hickies off the plate. Havn't contacted Xpedx. There either clueless or they won't share what they know. Usually Endurance is a trouble free sheet, but when major problems like this show up, I'm afraid its got to be the paper.