People have been complaining about magic deleting the "linuxboot.cfg" file when updating a kernel. This can now be fixed by adding "dontdeleteme" to any of the "append" lines in your linuxboot.cfg file. This is a global parameter, it only needs to be added to ONE append line, e.g.:

title Gentoox
kernel vmlinuz
initrd initrd.gz
append dontdeleteme init=/linuxrc root=/dev/ram0 kbd-reset video=xbox:640x480,nohwcursor,hoc=13,voc=13
title Sparkle
kernel vmlinuz
initrd sprkrd.gz
append load_ramdisk=1 prompt_ramdisk=0 ramdisk_size=26215 rw root=/dev/ram kbd-reset

This will stop the file from being deleted. Do not run xbvset after editing your linuxboot.cfg file until you are fully updated with magic!