I have not found any difference though we use the same code virtually. The photo gallery has a viewcache remember so you will not get views updated immediately so it may be virtually impossible to tell the affects with that cache on since views are not updated right away so you dont know if the gallery is affected or not.
Make sure in your showproduct.php filethe ipcache code is this. I made one slight change to the time strings but that should not affect anything
Code:
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