I am running 2 laptops. One runs Ubuntu 10.04 and the other dual boots Ubuntu 10.10 and LMDE. I installed a colored picture as a login background in LMDE with no problem.

I next tried it in Ubuntu 10.10 using Ubuntu Tweak. It didn't work. I put the picture in GIMP and converted it to b&W and it works fine. I tried the same thing in Ubuntu 10.04 and needed to convert to b&w again.

The colored photos I used as grub background work fine on both machines. This is just a curiosity and not a real problem.

Earl