FPBX17.
Just noticed UCP tries to get images from /modules/ucp/htdocs/images/mycustomimage.png even though it is pulling the directory and file name from Settings > Advanced Settings > Image: Left Upper which I have set to images/mycustomimage.png.
So while the main pages will pull the image from the correct place, UCP will prepend it with /modules/ucp/htdocs/. That means I have to put mycustomimage.png In /admin/images and /modules/ucp/htdocs/images for it to work in both places based on that one setting in Advanced Settings. Seems like a bug to me.
UCP is also using it’s own hardcoded images in the footer. That is inconsistent with what it is doing with the upper left image so if I were to also configure a custom footer image in Advanced Settings that would be ignored by UCP as far as I can tell.