When replacing an items image, you can select the check box to delete the existing image. When uploading a new image, and selecting the checkbox, the old image will be deleted, but the new image is not saved.
What is the problem when always the old picture appears and it won`t respond to the Upload neither to delete checkbox or other things i tried in the item editor?
Ok, i guess i have found something, does it have something to do with the K2 cache-system, that only every single article is refreshed? Anyway, now it works (not every time in the backend, the thumb doesn't change, but everywhere else.