Received a book, just a couple pages wavy & crinkled from getting wet.  No other damage, no stain.  Would you mark as problem.  It's completely readable,and not  offensive to me.  But, rules are rules & I don't believe it's repostable?  I don't want to loose a credit. 

Yes, that is water damage and should be marked as a "problem".

It is unpostable.  It can, however, be posted in the "Book Bazaar" section of the forum later on and offered as a deal there.

Yes, unfortunately it sounds unpostable.

Any water that causes staining or texture change in the paper is water damage.

I generally don't count things like wavy pages from humidity as water damage, though.

Yours sounds like water damage.

(One caveat ... if the damaged pages are not text pages, then technically they could be removed from the book and it would still be postable.  So, if  water has damaged a page that is clearly not a text page, I will let that slide, since the page is not required to post the book.)

Wavy and crinkled are actually two different things.  Some of the newer papers will 'wave' in humidity...and normal amounts in the air can be enough to cause wave. IMO humidity is not liquid damage (which is unpostable by PBS guidelines).  I currently have a mmpb sitting on my computer desk that has wave on the edges of three pages scattered throughout the book.  I purchased this book new, read about 10 pages, set it aside and haven't touched it for a year.  It has never been exposed to liquid and was stored in a box with other undamaged books.  I've no idea why 3 pages waved, our climate isn't overly humid.

Now crinkle IME is almost always caused by water (or liquid) directly on the pages, such as a damp hand or rain drops.

Thanks,  no doubt this was caused from wet hand or spilled water. 

I searched for this topic, because recently I got a book with clearly some wavy pages, and some wavy pages with crinkled edged, but could not see a water spill or mark.  These only occur in the 1st 20% of the book not the back.

I dont think I could post this book after I read it.   But even after reading this I am not sure if I should mark it as received with a problem.

You Know what?  if it was that noticeable when I opened the book then it is not postable to me or to others.

Humidity can cause the waving of the pages, but usually only if it actually got wet somehow will the texture of the spot or page change.  That's usually how I can tell the difference.