siggy image does not change


Well-known member
I wanted to change my signature pic on this forum. I didn't want to change the image url so I replaced the image with a new one at my server end, but when I insert the image url, the same old image was appearing. It seems like an old image is cached for a particular url and even if the image changes, the signature picture will stay the same. Is it possible to add something that says that the image at the url provided has changed and whether we'd like to accept the new image?