i am trying to use your plugin (with twentytwelve theme). First it worked great. But than, I decided to use diffenrent sized header images. I deleted the old ones (media-area) and I deactivated/activated your plugin (later I deleted it and installed it again). I uploaded the new header images for different pages. But now the imagesize is wrong. Looks like, the older (bigger) image size is still somewhere notified. Thats why the new images are scaled larger as they are. Naturally that looks awfull. What can I do, to get the original image size dimensions (624x136) displayed?