The problem is probably in syslinux-themes-debian-squeeze (list of files from [1])
/usr/share/syslinux/themes/debian-squeeze/syslinux-live/config.c32 /usr/share/syslinux/themes/debian-squeeze/syslinux-live/hdt.c32 /usr/share/syslinux/themes/debian-squeeze/syslinux-live/isolinux.bin /usr/share/syslinux/themes/debian-squeeze/syslinux-live/isolinux.cfg /usr/share/syslinux/themes/debian-squeeze/syslinux-live/live.cfg /usr/share/syslinux/themes/debian-squeeze/syslinux-live/memtest.bin /usr/share/syslinux/themes/debian-squeeze/syslinux-live/menu.cfg /usr/share/syslinux/themes/debian-squeeze/syslinux-live/other.cfg /usr/share/syslinux/themes/debian-squeeze/syslinux-live/reboot.c32 /usr/share/syslinux/themes/debian-squeeze/syslinux-live/rosh.c32 /usr/share/syslinux/themes/debian-squeeze/syslinux-live/splash.png /usr/share/syslinux/themes/debian-squeeze/syslinux-live/stdmenu.cfg /usr/share/syslinux/themes/debian-squeeze/syslinux-live/vesamenu.c32 [1] http://packages.debian.org/sid/all/syslinux-themes-debian-squeeze/filelist
