@fevzikorkutata I don't understand what you're saying.
That fix is in 1.17.0 so you shouldn't have run into that issue if you went straight from 1.0.3 to 1.17.0 as I recommended.
Could it it be a possible future enhancement for the catogories to have the same as they are now where you can choose the color & icon but also have the option to upload a image to use instead of the color, keep the option to use the icons over the image, I ask this as I know it's going to take me a very long time to master enough of the coding to change this for myself.
I do like the background though. Maybe drop it in photoshop and optimize it, and make it a PNG instead. If you could get it to around 200kb or so that would be ideal.
Don't forget you might get mobile users, and if they're on a limited data plan you'll have some angry mobile users
I added a couple more to the list...
I think the list is starting to get pretty big haha (maybe move the list to a wiki page?)
and then unpin this, create a new topic "Interesting NodeBB Forums" or something (which also links to the full link on the wiki), that lists themed forums or at least are doing something that isn't just the plain default, ex. category images/layout