Errors on 6 different systems today:

29760545 29291508 44207 1 Jul 2013 19:47:29 UTC 1 Jul 2013 22:48:12 UTC Error while computing 10,798.87 0.33 --- Data collect version 3 v3.51 (nci)
29760475 29291438 55301 1 Jul 2013 19:47:40 UTC 1 Jul 2013 22:49:46 UTC Error while computing 10,799.65 3.50 --- Data collect version 3 v3.51 (nci)
29760319 29291286 11572 1 Jul 2013 19:43:55 UTC 1 Jul 2013 22:45:29 UTC Error while computing 10,807.28 0.02 --- Data collect version 3 v3.51 (nci)
29760184 29291153 50925 1 Jul 2013 19:38:27 UTC 1 Jul 2013 22:44:01 UTC Error while computing 10,810.25 0.58 --- Data collect version 3 v3.51 (nci)
29760165 29291135 52326 1 Jul 2013 19:38:19 UTC 1 Jul 2013 22:43:49 UTC Error while computing 10,807.54 3.43 --- Data collect version 3 v3.51 (nci)
29755297 29286398 53904 1 Jul 2013 16:52:07 UTC 1 Jul 2013 19:53:29 UTC Error while computing 10,786.49 14.65 --- Data collect version 3 v3.51 (nci)

Two types:

Client state Compute error
Exit status -2147483645 (0xffffffff80000003)

Client state Compute error
Exit status 193 (0xc1)

Example:

Name wu_v3_1372596523_53105_0
Workunit 29291508
Created 1 Jul 2013 19:45:54 UTC
Sent 1 Jul 2013 19:47:29 UTC
Received 1 Jul 2013 22:48:12 UTC
Server state Over
Outcome Computation error
Client state Compute error
Exit status -2147483645 (0xffffffff80000003)
Computer ID 44207
Report deadline 11 Jul 2013 19:47:29 UTC
Run time 10,798.87
CPU time 0.33
Validate state Invalid
Credit 0.00
Application version Data collect version 3 v3.51 (nci)
Stderr output

<core_client_version>7.0.64</core_client_version>
<![CDATA[
<message>
One or more arguments are invalid
(0x80000003) - exit code -2147483645 (0x80000003)
</message>
<stderr_txt>
20:47:28 (6256): Nombre de GPU non conforme: 2
20:47:28 (6256): Erreur wu_terminee (wu deja reportee)
21:28:28 (6256): Erreur wu_terminee (wu en cours d'upload) 4
21:28:29 (6256): Erreur wu_terminee (wu en cours d'upload) 4
21:32:28 (6256): Erreur wu_terminee (wu en cours d'upload) 4
ERROR: Invalid parameter detected in function (null). File: (null) Line: 0
ERROR: Expression: (null)


Unhandled Exception Detected...

- Unhandled Exception Record -
Reason: Breakpoint Encountered (0x80000003) at address 0x75B93219

Engaging BOINC Windows Runtime Debugger...

The WUs sent between 18:30 UTC and 20:30 UTC with Version Data collect version 3 v3.51 (nci) where erroneous.
After 20:30 UTC a new Version Data collect version 3 v3.52 (nci) was released and is running without errors now.

JayPi