E: Malformed line 77 in source list /etc/apt/sources.list (dist parse)
E: The list of sources could not be read.
Go to the repository dialog to correct the problem.
E: _cache->open() failed, please report.
.. these are are errors i got when i try to open synaptic package manager.. right after following an instruction on the net on how to install 915 driver!,, how can i fix this?