I installed SL 10.1 build 806 and (successfully) updated the kernel with rpm.

I got these error messages:

ERROR: Bootloader::Library::Initialize: Initializing for unknown bootloader none
ERROR: Bootloader::Core::ListFiles: Running generic function, it should never be called
ERROR: Bootloader::Core::ParseLines: Running generic function, it should never be called
Can't use an undefined value as an ARRAY reference at /usr/lib/perl5/vendor_perl/5.8.8/Bootloader/Tools.pm line 321.
ERROR: Bootloader::Library::Initialize: Initializing for unknown bootloader none
ERROR: Bootloader::Core::ListFiles: Running generic function, it should never be called
ERROR: Bootloader::Core::ParseLines: Running generic function, it should never be called

It's true that I do not have a boot loader configured for this installation (it's a mutiboot host for reference testing and the boot loader is preconfigured for all partitions, so there's no need to re-install it).

I did not see these messages before (SL 9.0 - SLES10 beta8).