3.1.1 has send 168 shares to backup pool in 3 hours... And then it totally crashed my computer. Is this do to the fact that I'm using 2.11.4 where I can... Please let me know how can I help you find reason...
EDIT: But 3.1.1 runs OK on Slush. Didn't test it jet on any other...
[2013-06-11 18:59:27] Accepted 3eedb6fe Diff 4/2 ICA 0 pool 0
[2013-06-11 18:59:31] Accepted 24515a7f Diff 7/2 ICA 2 pool 0
[2013-06-11 18:59:31] Accepted 3aa98be7 Diff 4/2 ICA 1 pool 0
[2013-06-11 18:59:35] Stratum connection to pool 0 interrupted
[2013-06-11 18:59:35] Lost 1 shares due to stratum disconnect on pool 0
[2013-06-11 18:59:43] Pool 0 stratum+tcp://mmpool.bitparking.com:3333 not responding!
[2013-06-11 18:59:43] Switching to pool 2
http://mergedmining.btcguild.com:8332 [2013-06-11 18:59:48] ICA2: invalid nonce - HW error
[2013-06-11 18:59:49] ICA1: invalid nonce - HW error
[2013-06-11 18:59:55] Accepted 02f2f599 Diff 86/1 ICA 2 pool 2
[2013-06-11 19:00:01] Accepted 0b77f4f6 Diff 22/1 ICA 2 pool 2
[2013-06-11 19:00:01] Accepted d3e58054 Diff 1/1 ICA 0 pool 2
[2013-06-11 19:00:01] Accepted 455f6462 Diff 3/1 ICA 0 pool 2
[2013-06-11 19:00:02] Pool 0 stratum+tcp://mmpool.bitparking.com:3333 alive
[2013-06-11 19:00:02] Switching to pool 0 stratum+tcp://mmpool.bitparking.com:3333
[2013-06-11 19:00:02] Accepted 0758a229 Diff 34/1 ICA 2 pool 2
[2013-06-11 19:00:04] Accepted 25e20dd7 Diff 6/1 ICA 0 pool 2
[2013-06-11 19:00:11] Accepted af071cf1 Diff 1/1 ICA 2 pool 2
[2013-06-11 19:00:26] Accepted 5b9f8a32 Diff 2/2 ICA 2 pool 0
[2013-06-11 19:19:42] Accepted 60c5017c Diff 2/2 ICA 1 pool 0
[2013-06-11 19:20:13] Accepted 7e186951 Diff 2/2 ICA 0 pool 0
[2013-06-11 19:20:20] Accepted 2bc771e5 Diff 5/2 ICA 2 pool 0
[2013-06-11 19:20:35] Stratum connection to pool 0 interrupted
[2013-06-11 19:20:35] Lost 2 shares due to stratum disconnect on pool 0
[2013-06-11 19:20:42] Pool 0 stratum+tcp://mmpool.bitparking.com:3333 not responding!
[2013-06-11 19:20:43] Switching to pool 2
http://mergedmining.btcguild.com:8332 [2013-06-11 19:20:47] ICA0: invalid nonce - HW error
[2013-06-11 19:20:50] ICA0: invalid nonce - HW error
[2013-06-11 19:20:52] ICA2: invalid nonce - HW error
[2013-06-11 19:20:53] ICA2: invalid nonce - HW error
[2013-06-11 19:20:54] ICA1: invalid nonce - HW error
[2013-06-11 19:20:54] Accepted 49222ee9 Diff 3/1 ICA 0 pool 2
[2013-06-11 19:21:06] Accepted e5ce89aa Diff 1/1 ICA 2 pool 2
[2013-06-11 19:21:14] Accepted 9aff1087 Diff 1/1 ICA 1 pool 2
[2013-06-11 19:21:20] Accepted ef4d83c9 Diff 1/1 ICA 2 pool 2
[2013-06-11 19:21:26] Pool 0 stratum+tcp://mmpool.bitparking.com:3333 alive
[2013-06-11 19:21:26] Switching to pool 0 stratum+tcp://mmpool.bitparking.com:3333
[2013-06-11 19:21:39] Accepted 25fc3274 Diff 6/2 ICA 1 pool 0
[2013-06-11 19:21:50] Pool 0 stale share detected, submitting as user requested
[2013-06-11 19:21:50] Accepted 374d65cc Diff 4/2 ICA 1 pool 0
[2013-06-11 19:21:56] Pool 0 stale share detected, submitting as user requested
[2013-06-11 19:21:56] Accepted 2ee387fa Diff 5/2 ICA 0 pool 0
Jumps are also causing HW errors... And that can crush CGminer that still has problems with USB ASIC miner sticks... 3.1.1 is the most stable version for this...
EDIT2: This isn't small problem. Now that there is no getwork to stop jumping to backup. I see that only 35 minute later I have 230 shares on backup. So additional 62 or almost 2 per minute... I'm loosing a lot idling on jumps and lost shares do to stratum disconnect...
Please let me know if and how I can help to fix this...