This is curtesy of sobria which will fix that problem you mention



PROBLEM: Admin Login Screen

In the D6.1.5 Patch the new Admin Images are located in the admin/images/icons folder and need to be in the admin/images folder. Which is were they are being called from.



FIX: Move all the images from the admin/images/icons folder in the D6.1.5 Patch and upload to the admin/image directory.