Me too... it seems like if the pic was originally in your post, you can't even save it off and rename it either. This forum doesn't seem to like duplicates!

...hey, I think I've got it! Go to the original post, right click the image and select "view image". Copy that URL (image only), then in your new post, do an "Insert Image" (5th icon from the right above the editor), and paste the link you just copied. Here's Njord done that way...