'Indexed on' colour

Question

Morning everyone,
I'm encountering a repetitive problem that is proving near impossible to solve. I'm trying to edit some four-colour black images to mono, using the Acrobat 'Edit Image' tool to edit with Photoshop, however on PDFs created through pretty much any means, however generically through Distiller, there is a colour setting that is completely un-recognised by Photoshop and simply cannot be editted to fix the four-colour elements of the image.
We're using Enfocus Pitstop 8 with Acrobat Professional 9 and Distiller 9, and the setting reads on Pitstop as 'Indexed on' colour. For example 'Indexed on CMYK' 'Indexed on RGB' and even 'Indexed on ICC profile' etc.
I need to be able to edit these images, but Photoshop doesn't recognise this strange colour-space, and thows it out.
Now, using Pitstop you can change the colour from RGB to CMYK to LAB to ICC Profile, anything you like, but you cannot remove that prefix 'Indexed on' and as far as I know that's what's causing all my woes. After speaking with Enfocus for a few weeks now, we can't solve this with their software, no way no how, so I have come to seek answers from the Adobe experts instead.
Does anybody else have knowledge of, experience of dealing with, or possibly a solution to this problem?
My thanks in advance.
Dominic.

Answer 1

Thanks for your help guys, but unfortunately for everybody here who's time I've wasted, the answer didn't come from Adobe or Enfocus; It was our network!
I can't explain this very well, but there's a problem with Thursby Dave Networking version 7.1.2 This update causes a loss of all type and creator files when accessed actross a network to a FAT file system (or similar, such as a NetApp Filer). As far as I understand it, when accessing the PDF in question across the network I was completely unable to extract the images to Photoshop because it lost all the data in the process of transferring it to the machine in question.
The reason it wasn't happening with other images was simply because the colour space information for basic CMYK, RGB, etc. was recognised regardless of the transfer-induced data loss, however because the colour space 'Indexed on' isn't a default type, it caused an error.
So believe it or not, the error was not in the software, the mac configuration or the file setup, just with the network configuration we work with.
(For anybody else getting a problem with their OSX10.5 machines across a network with Dave Networking 7.1.2, try the short-term fix that worked for us: uninstall Dave and re-install the basic 7.1 package and the problem is fixed.)
Thankyou everyone for your time and effort, and I apologise for wasting it.
PS; Thanks Glenn, Andy say's Hi, we're at the Shaftesbury branch. If you want to drop him a line look up the Blackmore official number on our site (won't put it in text here) and amend the last three digits to 149.