PLEASE help

I guess this wouldn't normally be considered an urgent question... but I just have to know. In photoshop 7, the mac version, when you open up a picture that has been previously photoshoped on another computer, in a different version of the program, would the picture open up as the original? The reason is, one of my friend's claims, very seriously, that when he opens up old pictures of me, that have been photoshoped, it opens up the original one and not the photohoped version. Or that it shows the thumbnail as the original picture. I'd just like to know if this is true... can someone please help me? I really need to know...
It sounds so stupid to me, and I don't know how it could possibly be true... I thought, that if you save a picture in it's final format, after photoshoping, it'd stay that way forever... I don't know how it could just TAKE OUT all of the photoshoped things in there... especially if it wasn't even done on that computer. Maybe this is just some new feature or something though. Please, just let me know if this is even possible. I'd really appreciate your help...

Thanks in advance!

If you are actually talking about the "icon" that photoshop produces, that is a thumbnail image of the photoshop'd file... then Yes... on the Mac I HAVE seen Files get saved yet the thumbnail image still appear as it did before it was manupulated.

I haven't had it happen on the PC platform but I have seen it happen on the MAC platform. It can only be explain as the Mac didn't update its icon/thumbnail apon later saves.

Hey, thanks for your reply, it helped a lot. :-)
Just one more question though... Is there any way you can block that, or make it NOT happen? I mean, is there any way at all you can make sure that doesn't happen? That it'll open up normally... I just need to know if there's any way at all...
thanks again for your help.