Ubuntu Twaek won't start after latest 12.04 update...

Same here.

The splash screen is seen when the launch icon is clicked. Then nothing. The app doesn't launch at all.

So is there a fix for this one? I am also having exactly the same problem...

Confirmed

After an update via the UT repo, I get the following:

baldrick@baldrick:~$ ubuntu-tweak

Traceback (most recent call last):
  File "/usr/bin/ubuntu-tweak", line 72, in <module>
    window = UbuntuTweakWindow(feature=options.feature, module=options.module)
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/main.py", line 292, in __init__
    tweaks_page = FeaturePage('tweaks')
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/main.py", line 178, in __init__
    viewport = Gtk.Viewport(shadow_type=Gtk.ShadowType.NONE)
TypeError: __init__() got an unexpected keyword argument 'shadow_type'

The only diff I see straight off is the last line '178', where the original was '171'.

Problem still exists for me.

Please upgrade to Ubuntu Tweak 0.6.2: http://ubuntu-tweak.com/

Same issue here and I am getting these errors in terminal

dpkg: error processing nfs-common (--configure):
 subprocess installed post-installation script returned error exit status 127
Processing triggers for initramfs-tools ...
/usr/sbin/update-initramfs: 236: /usr/sbin/update-initramfs: awk: not found
dpkg: error processing initramfs-tools (--configure):
 subprocess installed post-installation script returned error exit status 127
Errors were encountered while processing:
 nfs-common
 initramfs-tools
E: Sub-process /usr/bin/dpkg returned an error code (1)

@cmcanulty

Your package manager is broken by nfs-common, please try to report bug to nfs-common or try to fix the package manager by yourself.