Lars, any idea?

Same for me. iso is correct, burning seems correct, but the cd is not bootable...

At first: the iso is correct.

But it seems that the iso is too small for some broken BIOSes. They didn't find the correct bootimage. I have to check this on some of our hardware. Perhaps we can add some "placebo files" who waste some space so that these BIOSes can find something useful. 

My System (where this iso fails) is a Duron 800 with an ECS Elitegroup K7VZA Mainboard. 

It's a PC which was sold as Compaq Presario 5509.

If you have an iso for testing, i can for sure do this.

O.k. here it is:
ftp://ftp.suse.com/pub/people/lrupp/iso/SUSE-10.1-CD-OSS-i386-x86_64-Beta1-mini.iso
(247MB)

MD5SUM: be974dfc428e257affd624454b7f6d7f

I've tested this iso on a problematic host - it works here. But please give feedback if this iso solves your problem also. Then we should provide both: 
* arch specific mini-isos (with minimal size)
* combined mini-iso for problematic hosts
for the next Beta.

ro found a better fix: we can place the boot catalog after the boot loader  to give it a different address than sector 0x2f 

OK. Build real mini-isos again with new fix for sector 0x2f:
ftp://ftp.suse.com/pub/people/lrupp/iso/SUSE-10.1-CD-OSS-i386-Beta1-mini.iso (37M)

ftp://ftp.suse.com/pub/people/lrupp/iso/SUSE-10.1-CD-OSS-x86_64-Beta1-mini.iso (37M)

MD5SUMS: 
f383747645bf14c4ac031767dfb6156a  SUSE-10.1-CD-OSS-i386-Beta1-mini.iso
be974dfc428e257affd624454b7f6d7f  SUSE-10.1-CD-OSS-i386-x86_64-Beta1-mini.iso
ffe642f5b8449c7dc23ff5dd7ea64872  SUSE-10.1-CD-OSS-x86_64-Beta1-mini.iso

If these new mini-isos work, we should replace the old ones.

*** This bug has been marked as a duplicate of 143983 ***

Just tried the SUSE-10.1-CD-OSS-i386-Beta1-mini.iso and it works.

I am still downloading the combined one, but this will take some time :(

I can not try the x86_64 one, as i do not have such a system available