Overprinting in placed file

Can you reproduce the problem in CS5 and CS6 too (assuming you have those)?

Is there a workaround that would still allow me to place the .ai file? I have not found any, except for the two mentioned earlier (copy/paste and embed) which are not ideal.

Yet another inconspicuous bug in Adobe software.

CS4.

How can you share files here?

Hi Ton. No, the problem is not solved. Attached is an image illustrating what is going on.

On the left, two boxes, one with overprint set for fill and stroke, the other without overprint. The boxes on the left are part of the placed file.

On the right, two boxes, one with overprint set for fill and stroke, the other without overprint. The boxes on the right are copy/pasted from Illustrator.

Below everything is a simple blue background.

With View>Overprint Preview enabled, you can clearly see that the placed file discards all overprint settings it contains. If overprint settings were honoured, the boxes on the left would look just like the boxes on the right.

Even though it bears no significance, everything is on the same layer.

No, that's not the issue in my case. The overprinting is just discarded altogether once the file is placed. So I have to copy the artwork (which has overprint settings) and paste it directly instead.

Perhaps you can explain how to preserve overprint settings in both cases, spot colours and process colours.

How? Because as I explained, in my case, those settings are discarded once the file is placed.

My question is about preserving the overprint settings that are part of an Illustrator file, when that file is being placed in another Illustrator file, regardless of what's in the file.