Grub and Reiserfs

Hi all

I just installed Fedora Core 3 onto my pc which is running slackware as the 'main' os
I have been using LILO as the boot loader for a long time but thought I'd swap to GRUB for a change.

Fedora boots fine.

I have a seperate /boot partition for my slackware install ......its reiserfs. When I try to now boot slackware from GRUB I now get 'Error 13 invalid or unsupported executable format'

Does GRUB not understand this filesystem type? I could just switch everything back to LILO but now I'm curious! I am 'googling around' now but would appreciate any comments on this

many thanks