I've tried to replicate the fault here and the only way i can come close to doing this is: creating a new WEB document (rather than print document) and then preparing PDFs. Can't imagine something like this being overlooked, but that's the only way.

Is the OP able to package up the file using the package option from the file menu, and zip those files (plus a PDF made using the indesign file) and upload it somewhere... maybe using yousendit or something and then posting that yousendit link? We'd need to see what's being done because there's no way that artwork with vectors as taken in the OP's screengrab should produce a 5mb PDF.

agree with peter's post - i can't fault your PDF to behave like it was in your earlier posts. if i'd have received your PDF at my work, it'd be fine (apart from the fact that there is a black keyline on the page border - naughty!).

is there a step that we're not being told about here?

The conversion from 100% black to 92% black indicates there's a conversion to grayscale happening somewhere. It would be impossible to convert 0|0|0|100 CMYK to 0|0|0|92 CMYK when converting from one CMYK profile to another—there would always be CMY in the mix. If you set your PS Color Settings to the default and open the PDF with Grayscale set as the mode, the black converts to 93%

I seem to be having this same problem with the InDesign CS6 demo.

Did anyone figure out how to get it to export files correctly?

Now I'm finding that the PDF created using "Document RGB" looks fine on its own, but if I add it to another existing PDF it ends up looking grey again.  This is so confusing!

File -> Export -> Output

  Color Conversion -> Convert to Destination (Preserve Numbers)

  Destination -> sRGB IEC61966-2.1

  Profile Inclusion Policy -> Don't Include Profiles

The OP's job was printing on an offset press. You've converted your PDF to all sRGB, so if it's output to separations any black objects would print as 4-color not 100% black.

It's too bad this is such a convoluted process.

I don't see any problem with 1-bit black or text black with a CMYK Transparency Blend Space, either in InDesign's Separation Preview or in Acrobat's Output Preview after exporting via the PDF/X-4 preset. In all cases output reads as 0|0|0|100 CMYK, which is what you would want and expect going to  press

A placed all black 1-bit psd in ID

Exported to PDF/X-4

Are you outputting separations or to a composite printer? If composite  is your Print>Output>Color, Composite Gray or Composite CMYK?

Rob Day is talking about some kind of press preview, whereas I am getting grey output on screen even if I try to use the PDF/X-4 preset.

The OP's document is going to press—the destination is CMYK.

If you are working for screen then set your document's intent as Web or Digital Publishing (File>Document Setup). In that case the  [Black] swatch, which by default is assigned to your placed 1-bit image, will be 0|0|0 black RGB and will stay that way on export to PDF. If you export to an RGB or Unchanged Color destination (PDF/X-4) the RGB black will be unchanged

Correction: Actually if I go all the way back to a new document with Intent set to Digital Publishing and then place the TIFF again, then it will export correctly!  Hooray!

On the other hand, changing Intent from File -> Document Setup does not work as described on the existing file(s).

So I have a somewhat better work around now, thank you Rob Day.

I have not created any swatches at all.  This is a simple 1-bit TIFF being placed in an InDesign document.  I can't believe how complicated this is becoming.  Let's just be happy that my new documents are working.

As I said earlier, the export does work with new files.

I invested an extraordinary amount of time fiddling with different settings and I've found that you should be able to replicate a problem with the Document Setup method by first setting the Transparency Blend Space to Document RGB, which I had done to my files as previously described.  Following that, a change of the Intent setting from Print to Web still results in greys instead of blacks at export.  For some reason, InDesign exports 1-bit images in a 4-channel CMYK format after that particular combination of settings.

Your solution does work after I add another step:

1. Open the document that has the image placed in it.

2. Reset the Transparency Blend Space setting to Document CMYK.

3. Change the Intent setting to Web or Digital Publishing.

4. Export to PDF.