< SOLVED > Problem when Adding PPA's

[gold_finger]

Earlier today I did a fresh install of LL 1.0.8 with no problems.  I then went to add a PPA for installing a command line utility "inxi" following directions on there site here:  http://smxi.org/site/install.htm#inxi.  I got an error message when trying to add the PPA.  Figured it might just be some kind of temporary problem so I reversed what I did and installed it manually.  Didn't think any more about it.

Now (an hour or so later), I just tried adding the PPA for the Plank dock application and got the same error message -- so apparently it wasn't an isolated one-off error caused by the last PPA source I tried.  Must be something I'm missing or set-up wrong on the LL system, but I don't know how to fix it.  Anyone else have an idea of what the following error message is indicating as the problem?

Code:

bill@Kitchen:~$ sudo add-apt-repository ppa:ricotz/docky
[sudo] password for bill:
You are about to add the following PPA to your system:
Docky/Plank testing packages


More info: https://launchpad.net/~ricotz/+archive/docky
Press [ENTER] to continue or ctrl-c to cancel adding it

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 551, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 99, in run
    self.add_ppa_signing_key(self.ppa_path)
  File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 132, in add_ppa_signing_key
    tmp_keyring_dir = tempfile.mkdtemp()
  File "/usr/lib/python2.7/tempfile.py", line 322, in mkdtemp
    name = names.next()
  File "/usr/lib/python2.7/tempfile.py", line 141, in next
    letters = [choose(c) for dummy in "123456"]
  File "/usr/lib/python2.7/random.py", line 274, in choice
    return seq[int(self.random() * len(seq))]  # raises IndexError if seq is empty
ValueError: cannot convert float NaN to integer