Rejects are very high (6% with stratum, ~1% with getwork), I also get reject messages like "H-not-zero". Looks like something is screwed up...
Rejects over all are very low:
+-------------+----------+
| reason | count(*) |
+-------------+----------+
| NULL | 3756 |
| H-not-zero | 20 |
| quite stale | 16 |
+-------------+----------+
The last two here are from me testing the difficulty target check. It looks like the rest of these are failing the check, as they should. Those hashes certainly aren't right. That means there is some mismatch of data between the client and server.
Is it possible that your client is reconnecting and trying to submit shares for jobs it learned about on a previous connection? I don't have that working quite yet.
+------------------------------------+------------+------------+------------+---------------------+------------------------------------------------------------------+
| username | our_result | reason | difficulty | time | hash |
+------------------------------------+------------+------------+------------+---------------------+------------------------------------------------------------------+
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 07:58:52 | 743523edf408749ae13d9ee873c092f3b8edf728eee6d184bc9ce0952f6e500b |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:37:44 | 757a6e1c4113c1f7501c36bd31ce7e4e4ce4d7eb234ecab9e1602bc85dce73de |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:37:41 | 4890db9d3eef1fd2d3ebbe842460d066958021fc8c6390db149621bf5814e969 |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:37:37 | 76dc456b0b1636ccdfa32f8baf1ad96474c283ad5a991ff40a45a6ea7947b5ac |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:37:35 | 6faecf3b91bde22c912c1406918beb3838f1ae148ebbacfc83a5e1e7347295fd |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:37:22 | 9384c003d606b77f46ad474d87d74e693e709d6a9d8e1c1e23d08d906ee11cbd |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:37:14 | c5def3f1a5b47dfc9d9219f5192a4c62a5d6c7fe7502d5eca1c3cf721ce2925d |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:37:12 | c47bec16ae761e326d5f57ecce3d720bea977ec26ea9d21664280ffb314c9bb2 |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:37:12 | c50de5de26c86d2227bf1d15df1a4b8f096eb0b1bd7fb8b78ac4a2739f49dd82 |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:37:01 | 0027b7553f825aa14bb188f5a034d172eab22ce7802adc63f96efc103d9a182f |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:36:52 | af0ca2e7217a48cae672e05318dbae53b1ad1cdc7be87c57826215269bef2943 |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:36:45 | 231392a762f6c4b1551e39e6b5b64407b4d956024418df2db403fe65289502c3 |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:36:39 | 3170f121c3591406476deacc8eb8c5f0c9f4a227e72ed7f1509e632c5ec68de8 |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 05:36:39 | a9692eb13e11e2a2b9bf6efb4b9cc1a6fe4d8d03ac847e61e91759065020e678 |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 02:24:45 | 79627670370a6c3670fabed26eb5537e7634544a1e397f4febd32f2d33b97d50 |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 02:21:42 | 80aedaae2514553fcdee97296def3670d2ef66d44d24ffe3b5c7da729fb61709 |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 01:24:01 | 8e8dc6c6354d3def9061cefdebdbb70622528969e57eb1dda03b86273ba7efa2 |
| 139Ez4YdvCU1dgbXVqAcsB62zzTdRMA43g | N | H-not-zero | 64 | 2013-02-14 01:15:08 | 727be5db1bb10faa88f7950c837a62d7e811967d3c58ad92e91e609c012eff27 |
| 1FdKhHttWiwq6Wip1BBJG1f6ffD8pWYFiE | N | H-not-zero | 4 | 2013-02-13 20:11:48 | 0000000027cb6379960f461326a676f1493d074803b0172ae3ca7e05b6d63410 |
| 1FdKhHttWiwq6Wip1BBJG1f6ffD8pWYFiE | N | H-not-zero | 4 | 2013-02-13 20:11:38 | 000000001e9b9a1470e322aaac34201678b1f42244e29d39b794b8b6241cd964 |
+------------------------------------+------------+------------+------------+---------------------+------------------------------------------------------------------+