Thank you for adding the option to create thumbnails on the fly in the "Intro Image" and "Full article image", this is a great addition to an already excellent editor. I have however found what I believe is a bug with the new version (2.6.20). First of all when I installed it my custom settings for the thumbnails were removed and replaced with the default.
My settings are:
Which results in thumbnails being placed in the subfolder __thumbs and with the same name as the original image.
But this was replaces by
I tried to change this back to my custom settings but when I use the functionality from the "intro image" and "full article image" the default settings are still used. The thumbnail folder is created and the image is put in there with the name thumb_originalname.
If I instead try and create the thumbnail using the image manager extended inside an article body it works as before and my custom settings are used.