Windows XP Hey, Lately, for some reason, I'm unable to rename photos. This was very rarely if ever a problem before; but now, I cannot rename any. I searched Microsoft and Google, and haven't found anything. When I right click on a thumbnailed photo, then rename, then try to rename and enter, I get a message - "If you change a file extension, the file may become unusable. Are you sure you want to change it?" If I click yes, the photo's done and becomes unusable. Like I said before, this is new. Any thoughts?