Thank you, Mike, for reproducing the problem.
Yes, Quark's inexplicable alterations to placed PDF artwork have caused major problems here. Ad artwork, previously preflighted and approved to print, has been ruined upon output—IF Quark is set to export transparency natively. Here is an example:https://www.dropbox.com/s/kbbwf0ungozpl ... 6.pdf?dl=0
When you output it, look at the top type on the right—ruined if Quark is set for native transparency artwork, but fine if Quark is set to flatten transparency. Native transparency is the default now, and is course necessary for many workflows.
I do not think I can trust Quark 2015 for any further production work at this point. Why does it alter placed PDF's without warning, radically changing document structure and ruining artwork (we have multiple examples on the current project)?
Does anyone from Quark monitor this forum? I believe this is an urgent matter for them to explain and fix ASAP.