Hmm, we do have a splash for this resolution. And it works with no problems. 
Are you sure that you boot with the right 'vga' parameter? 
Closing this with WORKSFORME 

hi, I worked further on this problem. And I find something interesting.
When I installed Suse 10, it was 1280*1024. In that mode splash works. Later I 
tried to change it to 1400*1050 boot-loader setting in Yast (Actually 
1400*1050*24). Then I get no bootsplash (the same with 1024*768, and I have 
tried all the colordepth in each mode). 

Now things are getting a little bit more compilcated. 
1. I tried to follow what happens during booting, and I find /etc/rc.splash 
actually get resolution from fbresoluton, but in the /etc/fb.mode, I don't see 
1400*1050. This might not be the reason why bootsplash failed, but I guess it 
would be better to add 1400*1050 in fb.mode

2. What really bothers me now is that /proc/splash actually disappeared and I 
can't start the splash service at all, even in the original 1280*1024 mode 
which is suppose to work. What I have done these days is once to update the 
system through YOU. But i am not sure if that is the problem or not. So either 
your update file has a problem or there is something wrong with the splash 
that you cannot change the mode after installation.

You have to 
1) use the right vga parameter in the boot options, and 
2) run mkinitrd so that the right splash image gets appended to the initrd. 
   Check out the mkinitrd messages, it should tell you about the splash 
   size.