Ubuntu 11.10（oneiric ocelot）：
当我尝试通过 add-apt-repository 添加新的 ppa 时，它返回：
rene@rene-MS-N104:~$ sudo add-apt-repository ppa:tualatrix/ppa
Traceback (most recent call last):
File "/usr/bin/add-apt-repository", line 88, in <module>
ppa info = get_ppa_info_from_lp(usr, ppa_name)
File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 80, in get_ppa_info_from_lp
curl.perform()
pycurl.error(35, 'gnutls_handshake() failed: A TLS packet with unexpected length was recieved.')
我对 Ubuntu 还很陌生，不知道如何继续。