Hi, thanks for this great plugin. I have just a little problem with thumbnails: i have installed the plugin and next i have regenerated thumbnails (wordpress thumbs are 150x150px). If i set 150 px in the widget, thumbnails looks fine, and the source is true (150x150). But, if i set every other dimensions, like 50 px or 70 px, thumbnails looks fine, BUT source dimensions are 300 px (wordpress medium image). This is a problem for page load time, it would be better if thumbnail source is the lowest. For "source dimensions" i mean image properties, so the original image.
How I can fix the problem?