[mythbuntu] Error when adding repo for mythtv 0.26

Hi,

I am trying to update mythtv frontend from 0.25 to 0.26 on an Apple TV (1st gen) running Mythbunty 12.04.

I tried using mythbuntu-control-centre w/o luck so now I tried: sudo add-apt-repository ppa:mythbuntu/0.26

- but this results in error as shown:

Traceback (most recent call last):
File "/usr/bin/add-apt-repository", line 8, in <module>
from softwareproperties.SoftwareProperties import SoftwareProperties
File "/usr/lib/python2.7/dist-packages/softwareproperties/SoftwareProperties.py", line 53, in <module>
from ppa import AddPPASigningKeyThread, expand_ppa_line
File "/usr/lib/python2.7/dist-packages/softwareproperties/ppa.py", line 31, in <module>
import pycurl
ImportError: librtmp.so.0: cannot open shared object file: No such file or directory




Any idea what I need to do?

Thanks