Maybe time to contact Microsoft. Other than that, I found a similar problem via Google - images saved in PSP seen by PSP but not by another app or Windows. The solution there was turning off UAC but that person was using Vista. The only other thing I found was files not showing up until Explorer was refreshed (F5) but I don't think that would apply if you've gone back multiple times and not found it.

Is it possible that Poser is running under another account? Are saved images lost as well? Longshot - is indexing service running - not sure whether it applies to just viewing in Explorer or only searching. When you can see a file i.e. in Poser's open file dialog, right click and look at properties - is the location what you think it is or some user data folder that Windows is putting it in?

You might try usinf Everything (http://www.voidtools.com/) a very neat little file search utility. If it can see the files, maybe the author can shed some light on the problem. He's pretty savvy on the inner workings of NTFS.

Let us know when/if you find the answer, I'm really curious as to what it might be!

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken