completely useless bug report follows, but I feel obligated to offer it.
4.1, dual mining in linux. after several days,
read(): Resource temporarily unavailable
read(): Resource temporarily unavailable
read(): Resource temporarily unavailable
read(): Resource temporarily unavailable
read(): Resource temporarily unavailable
read(): Resource temporarily unavailable
read(): Resource temporarily unavailable
read(): Resource temporarily unavailable
read(): Resource temporarily unavailable
attempts to restart just hang.
Was fixed a few days ago, re-download v4.1 or use 4.2.