I was looking through the bands' myspaces and websites to check the days that they are all playing and came up with this. I suspect there may be some bands currently attributed to Friday which are wrong due to some tour schedules simply listing the first day of the festival (rather than the day the band actually play) but it should be fairly accurate:

Friday

Devo
M83
This Will Destroy You
Electric Wizard
Future of the Left
Jeffrey Lewis & The Junkyard
Casiotone for the Painfully Alone
HEALTH
Antipop Consortium
Sleepy Sun
The Cave Singers
Pink Mountaintops
Hush Arbors
Parts & Labor

Saturday

Beirut
Sleep
Harvey Milk
Jesu
Jesus Lizard
Young Marble Giants
Retribution Gospel Choir
The Acorn
Qui
Nico Mulhy
Lords

Sunday

Spiritualised
Sleep
Grails
Jesus Lizard
Shearwater
Sian Alice Group
School of Seven Bells

Unknown

Killing Joke
Marnie Stern
Errors
The Mae Shi
!!!
Liam Finn
Grouper