what dimensions do you suggest for the course player logo?
With the new option for the Course Player Logo the only restriction is that the width is set as is and regardless of the size of the image, the width will remain as it appears at 100% however if you have a long vertical image, there are no boundaries and you may find the logo takes up the full length of the page!
That may sound a bit odd however this is to allow for you to provide for different styles of logos and that the image will always fill left to right but variable from top to bottom. Generally I would first suggest to try a logo that is larger left to right and import it. Once set you will see that the top and bottom adjust accordingly!
Hope that helps!