[Linux-HA] question:anything but Red Hat 2.4.18-2.4.20.

[dingji]

it's said in http://wiki.linux-ha.org/FactSheet that:
Kernel Versions
Linux-HA will run on any kernel that doesn't have a major scheduler bug. 

For Linux, that means basically anything but Red Hat 2.4.18-2.4.20. 

what does it mean? I understand it as that Linux-HA cannot run on RH2.4.20.

Am I right or wrong? I made a two-nodes cluster before on Linux-2.4.20 with ipvs-109 patch, and it worked well during the time  I tested.

Is there some thing that didn't happen to me which will happen on a certain time?

or the above is to say that RH2.4.20 will not work well unless it is patched?

thanks for any comment and help