It's been a few weeks and maybe I've calmed down enough to try submitting some more isolated objects to IS.  I have a nice new bunch for them to reject, and I'm building a collection of "too feathered or too rough" rejection emails.

This set is of a collection of objects and could either be one very large image or a series of smaller images which can be tiled if desired.  It's not a bunch of 'similar' shots of the same thing - each individual image stands alone and contains different objects.  If I combine them, the buyer won't get as much resolution.

Yes, I know that whichever way I go, they'll reject it and want it the other way.  And when I do that, they'll say it contains artifacts.  But, I have to try. 

What is IS's position on sets like this? 

I don't have many problems with istock reviews lately, I  think most of the time they get it right.  I used to get more rejections before changing my screen, now I can see if there are any artifacts or other problems.  Sometimes I get a reviewer that finds problems that just aren't there but that's rare.