Recent Quality of Printing Books Through Lulu

Has anyone on the forum had any recent concerns or complaints regarding the quality of the printed quality of your books?  For example, a couple of weeks ago, I had to order 4 copies of one of our books for a contributor.  The books were printed, shipped and delivered but I got an email from the contributor that the 4 copies of the books he received were recently quite bent out of shape.

To quote his email:

"The books are all in good condition, with nice sharp corners on them. All four books do have a real curve to their paper though, the same thing that happened to two of the TTL3 books I ordered back in the winter. I don't know why I have this luck with getting multiple copies of books from Lulu: my contributor's copy of both TTL3 and Grave Warnings Omnibus were perfectly flat, but two of the extra TTL3's I ordered, and now these four GW's, have a significant curve to the paper of the entire book. I'll put these Grave Warnings books under a stack of hardcovers for a few weeks, and hopefully that'll flatten them out; that ended up doing the trick for the TTL3 copies that were curved."

I've attached copies of the pics he sent me to illustrate the problem.





Has anyone else had a problem like this with books they've received?

Thanks.