I got the same error until changing to an SVG type image, then it worked. I just converted from a PNG using inkscape.
- GRUB theming - background 白い熊
- Re: GRUB theming - background Tobias Geerinckx-Rice
- Re: GRUB theming - background 白い熊
- Re: GRUB theming - background Tobias Geerinckx-Rice
- Re: GRUB theming - background 白い熊
- Re: GRUB theming - background 白い熊
- Re: GRUB theming - backgro... ison
- Re: GRUB theming - bac... 白い熊
- Re: GRUB theming - bac... 白い熊
- Re: GRUB theming - bac... Joshua Branson
- Re: GRUB theming - bac... 白い熊
- Re: GRUB theming - bac... Joshua Branson
- Re: GRUB theming - background Stefan