Code:

[2012-10-16 00:25:41] Work job_id 5357 nonce2 3a000000 ntime 507c8d4a

[2012-10-16 00:25:41] Generated target 0000000000000000000000000000000000000000
000000000000ffff00000000
[2012-10-16 00:25:42] 91.5 C F: 85%(4570RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 97% P: 0%
[2012-10-16 00:25:42] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:25:42] 86.0 C F: 85%(1793RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:25:43] [thread 3: 813694976 hashes, 161118.3 khash/sec]

[2012-10-16 00:25:43] Reusing stratum work
[2012-10-16 00:25:43] Generated stratum merkle 5c50e633d5d4d7f31ad96da1acca0ddc
32b60641aa61c63f2ed23d0d32b44eee
[2012-10-16 00:25:43] Generated stratum header 000000023abf97081b55c5236db67b02
cebe9af34e1b36665a50b495000003a2000000005c50e633d5d4d7f31ad96da1acca0ddc32b60641
aa61c63f2ed23d0d32b44eee507c8d4a1a057e080000000000000080000000000000000000000000
0000000000000000000000000000000000000000000000000000000080020000

[2012-10-16 00:25:43] Work job_id 5357 nonce2 3b000000 ntime 507c8d4a

[2012-10-16 00:25:43] Generated target 0000000000000000000000000000000000000000
000000000000ffff00000000
[2012-10-16 00:25:43] [thread 4: 776994816 hashes, 153577.7 khash/sec]

[2012-10-16 00:25:44] Reusing stratum work
[2012-10-16 00:25:44] Generated stratum merkle 8833e39d5579b0110ac37701abae2317
673df355e03e848fa5713329f35c4122
[2012-10-16 00:25:44] Generated stratum header 000000023abf97081b55c5236db67b02
cebe9af34e1b36665a50b495000003a2000000008833e39d5579b0110ac37701abae2317673df355
e03e848fa5713329f35c4122507c8d4a1a057e080000000000000080000000000000000000000000
0000000000000000000000000000000000000000000000000000000080020000

[2012-10-16 00:25:44] Work job_id 5357 nonce2 3c000000 ntime 507c8d4a

[2012-10-16 00:25:44] Generated target 0000000000000000000000000000000000000000
000000000000ffff00000000
[2012-10-16 00:25:44] [thread 5: 787480576 hashes, 155129.0 khash/sec]

[2012-10-16 00:25:45] 91.5 C F: 85%(4548RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 97% P: 0%
[2012-10-16 00:25:45] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:25:45] 86.0 C F: 85%(1798RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:25:45] [thread 0: 1544552448 hashes, 305049.1 khash/sec]

(5s):936.7M (avg):936.7Mh/s | Q:8641 A:27338 R:47 HW:11 E:316% U:13.0/m
[2012-10-16 00:25:45] [thread 2: 807403520 hashes, 160508.3 khash/sec]

[2012-10-16 00:25:47] Reusing stratum work
[2012-10-16 00:25:47] Generated stratum merkle 364b46669f965971f49a4b4ba86446df
5cbad72f5005e50e00400817dc8254b1
[2012-10-16 00:25:47] Generated stratum header 000000023abf97081b55c5236db67b02
cebe9af34e1b36665a50b495000003a200000000364b46669f965971f49a4b4ba86446df5cbad72f
5005e50e00400817dc8254b1507c8d4a1a057e080000000000000080000000000000000000000000
0000000000000000000000000000000000000000000000000000000080020000

[2012-10-16 00:25:47] Work job_id 5357 nonce2 3d000000 ntime 507c8d4a

[2012-10-16 00:25:47] Generated target 0000000000000000000000000000000000000000
000000000000ffff00000000
[2012-10-16 00:25:48] Reusing stratum work
[2012-10-16 00:25:48] Generated stratum merkle 643052cd0d2894bbbacacfc7da8fc03c
cf444204fd0e6f1fd557e323ca441c81
[2012-10-16 00:25:48] Generated stratum header 000000023abf97081b55c5236db67b02
cebe9af34e1b36665a50b495000003a200000000643052cd0d2894bbbacacfc7da8fc03ccf444204
fd0e6f1fd557e323ca441c81507c8d4a1a057e080000000000000080000000000000000000000000
0000000000000000000000000000000000000000000000000000000080020000

[2012-10-16 00:25:48] Work job_id 5357 nonce2 3e000000 ntime 507c8d4a

[2012-10-16 00:25:48] Generated target 0000000000000000000000000000000000000000
000000000000ffff00000000
[2012-10-16 00:25:48] 91.0 C F: 85%(4548RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 97% P: 0%
[2012-10-16 00:25:48] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:25:48] 86.0 C F: 85%(1795RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:25:48] [thread 3: 817364992 hashes, 161047.7 khash/sec]

[2012-10-16 00:25:48] [thread 4: 786432000 hashes, 156339.4 khash/sec]

[2012-10-16 00:25:49] [thread 5: 780140544 hashes, 154688.7 khash/sec]

[2012-10-16 00:25:50] [thread 0: 1547173888 hashes, 307693.9 khash/sec]

(5s):938.8M (avg):936.7Mh/s | Q:8641 A:27338 R:47 HW:11 E:316% U:13.0/m
[2012-10-16 00:25:50] [thread 2: 811073536 hashes, 160060.5 khash/sec]

[2012-10-16 00:25:51] 90.5 C F: 85%(4570RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 97% P: 0%
[2012-10-16 00:25:51] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:25:51] 85.5 C F: 85%(1793RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:25:53] [thread 3: 811597824 hashes, 161470.5 khash/sec]

[2012-10-16 00:25:53] [thread 4: 779616256 hashes, 154769.0 khash/sec]

[2012-10-16 00:25:54] 91.5 C F: 85%(4570RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 98% P: 0%
[2012-10-16 00:25:54] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:25:54] 85.5 C F: 85%(1796RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:25:54] Reusing stratum work
[2012-10-16 00:25:54] Generated stratum merkle 56e4705b9c771181f57a40829b8485a0
52aec401c7de4d4982186ff9d295612c
[2012-10-16 00:25:54] Generated stratum header 000000023abf97081b55c5236db67b02
cebe9af34e1b36665a50b495000003a20000000056e4705b9c771181f57a40829b8485a052aec401
c7de4d4982186ff9d295612c507c8d4a1a057e080000000000000080000000000000000000000000
0000000000000000000000000000000000000000000000000000000080020000

[2012-10-16 00:25:54] Work job_id 5357 nonce2 3f000000 ntime 507c8d4a

[2012-10-16 00:25:54] Generated target 0000000000000000000000000000000000000000
000000000000ffff00000000
[2012-10-16 00:25:55] [thread 5: 783810560 hashes, 155539.8 khash/sec]

[2012-10-16 00:25:55] GPU 0 found something?
[2012-10-16 00:25:55] OCL NONCE 292974444 found in slot 0
[2012-10-16 00:25:55] Proof: 00000000317122e466f714d85616124b0a89cf46d91af7754
9e1fd2fc4fbac66
Target: 00000000ffff0000000000000000000000000000000000000000000000000000
TrgVal? YES (hash < target)
[2012-10-16 00:25:55] Pushing submit work to work thread
[2012-10-16 00:25:55] Popping work to work thread
[2012-10-16 00:25:55] Creating extra submit work thread
[2012-10-16 00:25:55] Submitting share 317122e4 to pool 0
[2012-10-16 00:25:55] [thread 0: 1547698176 hashes, 306093.6 khash/sec]

(5s):937.9M (avg):936.7Mh/s | Q:8641 A:27338 R:47 HW:11 E:316% U:13.0/m
[2012-10-16 00:25:55] [thread 2: 803209216 hashes, 159674.6 khash/sec]

[2012-10-16 00:25:57] 91.5 C F: 85%(4570RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 97% P: 0%
[2012-10-16 00:25:57] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:25:57] 85.5 C F: 85%(1799RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:25:58] GPU 2 found something?
[2012-10-16 00:25:58] OCL NONCE 2372215066 found in slot 0
[2012-10-16 00:25:58] Proof: 0000000043beb870a9eeec81d068e17bf0c6cdec62a831d79
085d82a99e9ffaf
Target: 00000000ffff0000000000000000000000000000000000000000000000000000
TrgVal? YES (hash < target)
[2012-10-16 00:25:58] Pushing submit work to work thread
[2012-10-16 00:25:58] Popping work to work thread
[2012-10-16 00:25:58] Creating extra submit work thread
[2012-10-16 00:25:58] Submitting share 43beb870 to pool 0
[2012-10-16 00:25:58] [thread 3: 809500672 hashes, 161053.2 khash/sec]

[2012-10-16 00:25:58] [thread 4: 773849088 hashes, 154113.6 khash/sec]

[2012-10-16 00:25:59] GPU 0 found something?
[2012-10-16 00:25:59] OCL NONCE 1594606699 found in slot 0
[2012-10-16 00:25:59] Proof: 00000000541c7a183c3175f3a9a6a16b1197ce8be3bef6d00
a2c8d6461b48442
Target: 00000000ffff0000000000000000000000000000000000000000000000000000
TrgVal? YES (hash < target)
[2012-10-16 00:25:59] Pushing submit work to work thread
[2012-10-16 00:25:59] Popping work to work thread
[2012-10-16 00:25:59] Creating extra submit work thread
[2012-10-16 00:25:59] Submitting share 541c7a18 to pool 0
[2012-10-16 00:26:00] [thread 5: 780140544 hashes, 155212.0 khash/sec]

[2012-10-16 00:26:00] 91.0 C F: 85%(4570RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 97% P: 0%
[2012-10-16 00:26:00] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:26:00] 86.0 C F: 85%(1790RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:26:00] [thread 0: 1542455296 hashes, 307244.4 khash/sec]

(5s):938 M (avg):936.7Mh/s | Q:8641 A:27338 R:47 HW:11 E:316% U:13.0/m
[2012-10-16 00:26:00] [thread 2: 815792128 hashes, 161629.7 khash/sec]

[2012-10-16 00:26:03] 91.5 C F: 85%(4570RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 98% P: 0%
[2012-10-16 00:26:03] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:26:03] 86.0 C F: 85%(1795RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:26:03] [thread 3: 805306368 hashes, 159837.2 khash/sec]

[2012-10-16 00:26:04] [thread 4: 782237696 hashes, 154920.3 khash/sec]

[2012-10-16 00:26:05] [thread 5: 784334848 hashes, 155643.8 khash/sec]

[2012-10-16 00:26:05] [thread 0: 1556086784 hashes, 309281.9 khash/sec]

(5s):939.7M (avg):936.7Mh/s | Q:8641 A:27338 R:47 HW:11 E:316% U:13.0/m
[2012-10-16 00:26:05] [thread 2: 813694976 hashes, 161598.3 khash/sec]

[2012-10-16 00:26:06] 91.5 C F: 85%(4548RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 98% P: 0%
[2012-10-16 00:26:06] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:26:06] 86.0 C F: 85%(1786RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:26:07] Reusing stratum work
[2012-10-16 00:26:07] Generated stratum merkle ebe6db761762b956ac2fc27dbfa6812a
5565ebda4f64c1c5bcae0b1f6db0e01d
[2012-10-16 00:26:07] Generated stratum header 000000023abf97081b55c5236db67b02
cebe9af34e1b36665a50b495000003a200000000ebe6db761762b956ac2fc27dbfa6812a5565ebda
4f64c1c5bcae0b1f6db0e01d507c8d4a1a057e080000000000000080000000000000000000000000
0000000000000000000000000000000000000000000000000000000080020000

[2012-10-16 00:26:07] Work job_id 5357 nonce2 40000000 ntime 507c8d4a

[2012-10-16 00:26:07] Generated target 0000000000000000000000000000000000000000
000000000000ffff00000000
[2012-10-16 00:26:08] GPU 2 found something?
[2012-10-16 00:26:08] OCL NONCE 3819531120 found in slot 0
[2012-10-16 00:26:08] Proof: 0000000025a36e11bc511d0bb17e10e801cbb331910372dd4
b49e50b99c50dd4
Target: 00000000ffff0000000000000000000000000000000000000000000000000000
TrgVal? YES (hash < target)
[2012-10-16 00:26:08] Pushing submit work to work thread
[2012-10-16 00:26:08] [thread 3: 807403520 hashes, 159999.4 khash/sec]

[2012-10-16 00:26:08] Popping work to work thread
[2012-10-16 00:26:08] Creating extra submit work thread
[2012-10-16 00:26:08] Submitting share 25a36e11 to pool 0
[2012-10-16 00:26:09] [thread 4: 784334848 hashes, 155089.8 khash/sec]

[2012-10-16 00:26:09] 91.0 C F: 85%(4570RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 97% P: 0%
[2012-10-16 00:26:09] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:26:09] 86.0 C F: 85%(1789RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:26:10] [thread 5: 779091968 hashes, 154572.7 khash/sec]

[2012-10-16 00:26:10] Reusing stratum work
[2012-10-16 00:26:10] Generated stratum merkle fc71d2870ccdcde7f4f0bcdb0d6594de
8e1cab017d2d911deffdf46ecaccf370
[2012-10-16 00:26:10] Generated stratum header 000000023abf97081b55c5236db67b02
cebe9af34e1b36665a50b495000003a200000000fc71d2870ccdcde7f4f0bcdb0d6594de8e1cab01
7d2d911deffdf46ecaccf370507c8d4a1a057e080000000000000080000000000000000000000000
0000000000000000000000000000000000000000000000000000000080020000

[2012-10-16 00:26:10] Work job_id 5357 nonce2 41000000 ntime 507c8d4a

[2012-10-16 00:26:10] Generated target 0000000000000000000000000000000000000000
000000000000ffff00000000
[2012-10-16 00:26:10] [thread 0: 1543503872 hashes, 304962.4 khash/sec]

(5s):937.7M (avg):936.7Mh/s | Q:8641 A:27338 R:47 HW:11 E:316% U:13.0/m
[2012-10-16 00:26:11] [thread 2: 809500672 hashes, 160765.4 khash/sec]

[2012-10-16 00:26:11] Reusing stratum work
[2012-10-16 00:26:11] Generated stratum merkle 62885714771c35e743df6b51e3313aba
02071a720e9e8275bdbb3d526b7178b3
[2012-10-16 00:26:11] Generated stratum header 000000023abf97081b55c5236db67b02
cebe9af34e1b36665a50b495000003a20000000062885714771c35e743df6b51e3313aba02071a72
0e9e8275bdbb3d526b7178b3507c8d4a1a057e080000000000000080000000000000000000000000
0000000000000000000000000000000000000000000000000000000080020000

[2012-10-16 00:26:11] Work job_id 5357 nonce2 42000000 ntime 507c8d4a

[2012-10-16 00:26:11] Generated target 0000000000000000000000000000000000000000
000000000000ffff00000000
[2012-10-16 00:26:12] 91.5 C F: 85%(4570RPM) E: 850MHz M: 1200Mhz V: 1.175V
A: 97% P: 0%
[2012-10-16 00:26:12] 75.5 C F: 85%(-1RPM) E: 875MHz M: 1225Mhz V: 1.163V
A: 99% P: 0%
[2012-10-16 00:26:12] 85.5 C F: 85%(1784RPM) E: 850MHz M: 1200Mhz V: 1.200V
A: 99% P: 0%
[2012-10-16 00:26:13] [thread 3: 811597824 hashes, 161278.0 khash/sec]

[2012-10-16 00:26:13] Reusing stratum work
[2012-10-16 00:26:13] Generated stratum merkle f0516baecbad2694f5414fa2d0ec6eb2
8be53b5206d1fa3e430f5fbc93d1705f
[2012-10-16 00:26:13] Generated stratum header 000000023abf97081b55c5236db67b02
cebe9af34e1b36665a50b495000003a200000000f0516baecbad2694f5414fa2d0ec6eb28be53b52
06d1fa3e430f5fbc93d1705f507c8d4a1a057e080000000000000080000000000000000000000000
0000000000000000000000000000000000000000000000000000000080020000

[2012-10-16 00:26:13] Work job_id 5357 nonce2 43000000 ntime 507c8d4a

[2012-10-16 00:26:13] Generated target 0000000000000000000000000000000000000000
000000000000ffff00000000
[2012-10-16 00:26:14] [thread 4: 786432000 hashes, 154922.6 khash/sec]

[2012-10-16 00:26:14] GPU 0 found something?
[2012-10-16 00:26:14] OCL NONCE 2450255323 found in slot 0
[2012-10-16 00:26:14] Proof: 00000000fdb15728d8f4bbaf977c785ff3d9cba608c0905cf
fcbd4283997dcf8
Target: 00000000ffff0000000000000000000000000000000000000000000000000000
TrgVal? YES (hash < target)
[2012-10-16 00:26:14] Pushing submit work to work thread
[2012-10-16 00:26:14] Popping work to work thread
[2012-10-16 00:26:14] Creating extra submit work thread
[2012-10-16 00:26:14] Submitting share fdb15728 to pool 0

that is the last output from debugging after the miners dieded last night.
The machines with miner 2.8.3 - win32 and started with --fix-protocol didn't die.
so it seems it has todo with stratum and win32.