[Schlutek]

I am trying to validate my epub files and am receiving the following warnings:

WARNING: /Volumes/IGS/BookProduction/eBook/NOLA/DC_F3497_Meet_Ebk/F3497_MeetC.epub: item (OEBPS/images/._DC_G1240_29_fmt.jpeg) exists in the zip file, but is not declared in the OPF file
WARNING: /Volumes/IGS/BookProduction/eBook/NOLA/DC_F3497_Meet_Ebk/F3497_MeetC.epub: item (OEBPS/images/._DM_Icon_fmt1.jpeg) exists in the zip file, but is not declared in the OPF file
WARNING: /Volumes/IGS/BookProduction/eBook/NOLA/DC_F3497_Meet_Ebk/F3497_MeetC.epub: item (OEBPS/images/._F3497_Eimg_Portraits_fmt4.jpeg) exists in the zip file, but is not declared in the OPF file

[This is the same warning I get for about 80 different files in a single book]

I now know that the files not declared are invisible (ghost) files. But what is creating these files? And how do I avoid?
The files were created on my Mac by exporting from InDesign 5.5, unzipped using ePub UnZip 1.0.app script, edited with Dreamweaver, and then zipped with ePub Zip 1.0.3.app script. I've read mention of the unzip/zip script not removing files when re-unzip/zip'ing the files - might that be the issue?

Also, I've figured out how to view the invisible files on my Mac through the Finder. Do any of the invisible files I find need to be kept? Or do I need to go through, one by one, each of my warning errors and delete that way?

Much appreciation to any advice!