Sorry, the pool has been under some ddos today.
We've noticed the miner throws that error oddly, change your vote to something (whatever) and connect then change it back to your desired vote.
Changing vote didn`t help. Tried deleting everything and then downloading everything again still doesn`t work. Tried on ubuntu 13, debian 6 and 7, all 64bit, same error stratum_recv_line failed. Now weird thing is that on all windows machines i get same error once and then it connects.
EDIT: adding "--retries 5 --retry-pause=20" fixed it for me.