Comment 5 for bug 834361

Lucid test:
Apt-purged tahoe and dependencies OK.
Added ppa successfully and apt update'd.
When trying to install tahoe-lafs (1.8.3-0ubuntu1~lucid1~ppa1) apt-get complains:

tahoe-lafs:
 Depends: python-foolscap but will not be installed
  Depends: python-simplejson (>=2.1.1) but will install 2.0.9-1build1
 Depends: python-pycryptopp but will not be installed

Versions installed/available in my repos:
python-foolscap: 0.5.1+dfsg-0ubuntu1 (lucid universe)
python-simplejson: 2.0.9-1build1 (lucid main) Ubuntuone-client, apport and others depend on it.
python-pycryptopp: 0.5.17-1 (lucid universe) Same problem as in Natty (lp bug #811721)

I haven't seen further instructions on the PPA guide to test further.