Black Bar Issue on XMB Menu Thumbnails

Hi everyone,
I’m experiencing a visual glitch on the XMB menu: thumbnails are showing with a black bar across them.
Has anyone encountered this before? Any idea what might be causing it or how to fix it? For reference, my image dimensions are:

  • 512x708 for boxarts
  • 512x384 for snaps

Thanks in advance!

up. noboby for help me

check settings > user interface > appearance > thumbnail backgrounds