Logo Cannot be changed / disabled

I can confirm this. In the short-term, perhaps consider creating a sub-theme

Here is a patch that changes the way the logo is handled, and allows switching it via the settings form. Also included is an image containing just the logo.

it would be nice to keep the sprite by default, is that possible?

it doesn't look like the patch sets a default value for the logo... is there something missing here?

As far as im aware, if the theme includes a logo.png file, it will be used as the logo for the default theme. This is why we cant use the sprite for it. it needs to be a separate file.

got it, it's good then.

Fixed in 06ef4db.