I'm pretty sure I did not use any references except this forum. Some people had complained about differences in colour between Preview and Adobe Acrobat.
OK, then it's my mistake, sorry. I should provide references to technical resources from GATF, Adobe and so forth. For instance, Dov Isaacs and Leonard Rosenthol on PDF/X-4 here
http://forums.adobe.com/thread/285723
To be honest, I am frustrated by the whole compatibility business. People post when they have problems, but they naturally do not spend time trying to isolate the exact elements that caused problems for their particular files. I do not blame them.
Everyday endusers don't understand the difference between a revisable and application-dependent file format, a non-revisable and application-independent page description format, and the increasing number of page description formats and sub-formats, nor do they understand that computerisation causes characters to be different from glyphs and colours to be different from colourants. This produces the problem that everyday endusers cannot detail the challenges they confront because they are comparing the incomparable.
Similarly, colour developers can be completely ignorant of composition and composition developers can be completely ignorant of colour which is to say that there is no common language for the two imaging models that must match if a page description is to be portable and repurposable. Software management and software marketing in Adobe, Apple, Heidelberg, Hewlett-Packard, Microsoft and so forth can be in a similar state. These problems are produced by organisations geared to engineering product, but not to using the product they engineer.
Apple's manuals are awful by the above argument, and the 'missing manuals' by technical publishers in the United States are based on the same awful assumption that application-dependent interface is the be all and end all of device independence, portability, and repurposing. These books are basically BAD, they are badly researched and they are badly reproduced, on bad paper, too.
/hh