I've had the same problem, but I found a solution.
On installation, Ubuntu just puts in the default config file for privoxy
without setting it up. Go to http://www.torproject.org/docs/tor-doc-
unix.html.en and go to the instructions for Step Two to set up the
privoxy config file. After testing i
Public bug reported:
my entire desktop crashed and started acting jerky with the mouse and
processing. im on ubuntu 6.10 edgy. i dont know much about programming
and linux and whatnot... but hope this of some help. usually a
ctrl+alt+bkspace helps out, but not 100% of the time. there doesnt
ap