Thank you very much, I was wrong… I thought that the image was the first within the post. I got sidepost working now. I also noticed that the image shown in the thumbnail is the older file in the gallery and that’s why I cannot change the thumbnail by changing the “order” of images in the gallery. Again thanks for sharing and please keep the good work.
I’m using the pluggin version 2.1.1 but I experimented the same error with the version before that.