It appears that when installed on quantal, even though the script specifies /usr/bin/python3, that gets stripped off and the binary is run as python2. The xpci code then gets hung up on a bytes/string conversion in python3-specific code.
It appears that when installed on quantal, even though the script specifies /usr/bin/python3, that gets stripped off and the binary is run as python2. The xpci code then gets hung up on a bytes/string conversion in python3-specific code.