if you try to open the tor project on backtrack or run it as root on any linux device you will get some error.
the way to solve it is to open the start-tor-browser in tor project folder via an text editor.
find:

if [ "`id -u`" -eq 0 ]; then
  complain "The Tor Browser Bundle should not be run as root.  Exiting."
  exit 1
fi

then change the 0 to 1 like this

if [ "`id -u`" -eq 1 ]; then
  complain "The Tor Browser Bundle should not be run as root.  Exiting."
  exit 1
fi