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Are you importing your images via Dataflow? If yes, then as I know, the images should be stored in the catalog - media/images
If you do not see images after import and they are placed to incorrect locations, as an alternative I can offer you to re-upload images using the application called Store Manager for Magento.
Here is 2 weeks free version available for download -
In any case, you can try it out, it should upload images correctly.
If any assistance required, let me know.