framebuffer problem in tdfx?

Hello,

I have a question. I use framebuffer on my 3dfx voodoo3 3000 graphic card I use framebuffer. When I only boot kernel (not using append) console switch from 80x25 to 80x30 and booting penguin si pretty nice, colored and its background is black.
When I instruct kernel with append using this in my lilo.conf

image=/boot/vmlinuz

        label=linux
        read-only
        root=/dev/hda3
        append="video=tdfx:1024x768-24@75"

console switch to 128x48 writing

fb: Voodoo3 memory = 16384K
fb: MTRR's turned on
tdfxfb: reserving 1024 bytes for the hwcursor at d1818000
Console: switching to colour frame buffer device 128x48
fb0: 3Dfx Voodoo3 frame buffer device

but penguin is black-white and background is white. After booting I can use console without problem and it is color. But I like my penguin. Where is problem? Is it on my side or problem of driver? This happens when I try to use 60 Hz too.

Thanks a lot

Michal