Don't embed the Illustrator files - you can link them - and send them the links in an InDesign Package.
You also didn’t say how far back you’re going in the save and from where?
If you’re on CC you have access to CS6 and later. If the recipient is using CS6 then you should be, too.
I embed them to avoid anyone altering them.
(Yes, I know you can unembed them - but you would be astounded
by how many people do not know that...)
Not to mention it is much more efficient to send 1 file instead of 2.
I am trying to simplify the process as much as possible.
I am working in CC and this particular client is using CS6.
I have also observed this same issues in CS5.5 and CS5
The file is being saved as an .idml file - so versioning shouldn't matter
as long as it is CS4 or newer.
By embedding the files you're making it more complicated.
You could always lock everything down in the Illustrator file. And if someone changes the illustrator file then that mistake is on their end.
You package the file - then zip it and send that. Include a PDF and IDML file in the zipped package, and send it to them.
Stress that no changes should be made to any of the artwork files in the "Links" folder - no matter what.
If only people made it that simple.
In the Illustrator file I have a layer with 300 pt Helveitca black in Red that states:
"Do NOT place any art in or alter this file in ANY Way!"
I have gotten files back from the client where they have eliminated the type
from that layer just to place their artwork there.
And the other thing to keep in mind is these Illustrator files represent
fully imposed press forms - generally 28" x 40"
I have been doing prepress for over 20 years and the simpler you can make
something, the better off you will be in the long run.
A single InDesign File with an embedded Dieline (Face on one page, Back on the next)
Is the most foolproof way I can come up with.
However, it appears InDesign is unable to handle this.
Well what can I say - I don't know why InDesign handles embedded illustrator files like that in the IDML file.
You know you can password protect your Illustrator files when saving them as an Illustrator PDF
That way they can't edit the file in Illustrator at all.
The thing that bothers me the most is that the Fast Preview is correct
and the preview in the Links panel is correct but the hi-res, full size preview is not.
How can it be correct everywhere except the actual image?
I have been doing some testing with locked pdf's but found there have
been some other issues there as well.
I don't understand it either - I don't have a solution for you on that front.