If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
Linux thinkpad 2.6.18.2 #1 PREEMPT Thu Nov 9 03:29:37 CET 2006 i686 GNU/Linux
 
Gnu C                  4.1.2
Gnu make               3.81
binutils               2.17
util-linux             2.12r
mount                  2.12r
module-init-tools      3.2.2
e2fsprogs              1.40-WIP
PPP                    2.4.4
Linux C Library        2.3.6
Dynamic linker (ldd)   2.3.6
Procps                 3.2.7
Net-tools              1.60
Console-tools          0.2.3
Sh-utils               5.97
udev                   100
Modules Loaded         ipt_REJECT savage xt_tcpudp ath_pci ath_rate_sample wlan ath_hal binfmt_misc pktcdvd lp iptable_filter ip_tables x_tables ipv6 dm_mod nvram cpufreq_conservative acpi_cpufreq usbhid snd_intel8x0 snd_ac97_codec snd_ac97_bus snd_pcm_oss snd_mixer_oss pcmcia firmware_class snd_pcm snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device 8250_pnp ide_cd cdrom uhci_hcd usbcore 8250 serial_core parport_pc parport e100 mii psmouse snd soundcore snd_page_alloc yenta_socket rsrc_nonstatic pcmcia_core pcspkr
