Aquoid Forum

I have set the front page to show excerpts. I have set the images set as such:
Display Thumbnails for Excerpts
Image specified through Custom Featured image
Thumbnail size in excerpts: Medium size, as defined in Settings -> Media

Here is my problem:
I want to show full-size images on the blog posts, themselves. However, when I set the thumbnails in Excerpts for the homepage as medium, it changes the image sizes on the blog pages, too.

I am not sure why changing the image size for "Excerpts" would change the individual blog posts' image sizes. What am I doing wrong?

By selecting a size for featured image in excerpts, the images from posts should not change their dimensions.
Except one situation - when you choose to show featured images in the posts themselves (Suffusion Options -> Layouts -> Layout: Excerpt / List / Tile / Mosaic / Full -> Show featured images for full content -> Display featured image, if available)
In this case will see the same featured image in the post as in the excerpt.

For avoiding this situation select "Don't show any image" at that option. Then add your image at desired size in the post. For the excerpt image can choose the same image in WP native featured image field or can let that field empty and Suffusion will use the first image from the post as featured image for excerpts.