FCKeditor is inserting images using <input...> tag, and not <img...> tag

I am using FCKeditor with IMCE, but the same thing happens when IMCE is disabled and I manually enter the image URL. Previously, when I entered an inline image in a node body, the editor generated an

But now, for some unknown reason, it inserts an

My server will not accept that code, so I then have to manually change it back to an Thanks.