If some fields are empty or look unusual you may have an old version.
Compare to the current minimal requirements in Documentation/Changes.
 
Linux sw-main 3.5.1-sw #1 SMP PREEMPT Fri Aug 10 04:03:42 IST 2012 x86_64 GNU/Linux
 
Gnu C                  4.7.1
Gnu make               3.82
binutils               2.22.0.20120323
util-linux             2.21.2
mount                  debug
module-init-tools      9
e2fsprogs              1.42.4
jfsutils               1.1.15
reiserfsprogs          3.6.21
xfsprogs               3.1.8
pcmciautils            018
PPP                    2.4.5
Linux C Library        2.16
Dynamic linker (ldd)   2.16
Linux C++ Library      6.0.17
Procps                 3.3.3
Net-tools              1.60
Kbd                    1.15.3
Sh-utils               8.17
wireless-tools         29
Modules Loaded         fuse ath9k joydev ath9k_common ath9k_hw ath mac80211 snd_hda_codec_hdmi coretemp kvm_intel snd_hda_codec_realtek acpi_cpufreq cfg80211 mperf acer_wmi sparse_keymap i2c_i801 lpc_ich mfd_core intel_ips wmi snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_timer psmouse serio_raw rfkill pcspkr kvm snd soundcore ac crc32c_intel microcode processor evdev thermal battery sr_mod cdrom sd_mod ahci libahci libata scsi_mod ehci_hcd i915 video button i2c_algo_bit intel_agp intel_gtt drm_kms_helper drm i2c_core