Hi,
>
> There is no difference between even and odd numbered kernels. The
> latest stable kernel at the moment is 2.6.21.5
> If you want to use 2.6.20 for some reason, then the latest is 2.6.20.14
>
> Well, there is a difference between even and odd kernel version, but
> this only applies to the second number 6. Before there was 2.2
> (stable), 2.3 (unstable), 2.4 (stable), 2.5 (unstable), 2.6 (stable).
> The numbers .20, .21 etc. do not follow this rule.
http://www.spinics.net/lists/linux-newbie/msg00179.html