Looking back at the one server log, do not see any 13360 errors occurring during the run of 8390 Events.
I see a 2776 event, and then bunch of 3310's appearing...then the 8390 events start up:
Error 2/14/2010 7:34:22 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:34:22 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:34:22 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:34:22 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:34:22 PM Enterprise Vault Archive Task 8390
Info 2/14/2010 7:34:18 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 7:24:18 PM Enterprise Vault Archive Task 3310
Error 2/14/2010 7:24:17 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:24:17 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:24:17 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:24:17 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:24:17 PM Enterprise Vault Archive Task 8390
Info 2/14/2010 7:24:14 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 7:14:14 PM Enterprise Vault Archive Task 3310
Error 2/14/2010 7:14:13 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:14:13 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:14:13 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:14:13 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:14:13 PM Enterprise Vault Archive Task 8390
Info 2/14/2010 7:14:10 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 7:04:10 PM Enterprise Vault Archive Task 3310
Error 2/14/2010 7:04:09 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:04:09 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:04:09 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:04:09 PM Enterprise Vault Archive Task 8390
Error 2/14/2010 7:04:09 PM Enterprise Vault Archive Task 8390
Info 2/14/2010 7:04:06 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 6:54:06 PM Enterprise Vault Archive Task 3310
Info 2/14/2010 6:54:02 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 6:44:02 PM Enterprise Vault Archive Task 3310
Info 2/14/2010 6:43:58 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 6:33:58 PM Enterprise Vault Archive Task 3310
Info 2/14/2010 6:33:53 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 6:23:53 PM Enterprise Vault Archive Task 3310
Info 2/14/2010 6:23:49 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 6:13:49 PM Enterprise Vault Archive Task 3310
Info 2/14/2010 6:13:45 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 6:03:45 PM Enterprise Vault Archive Task 3310
Info 2/14/2010 6:03:41 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 5:53:41 PM Enterprise Vault Archive Task 3310
Info 2/14/2010 5:53:36 PM Enterprise Vault Archive Task 2217
Error 2/14/2010 5:43:36 PM Enterprise Vault Archive Task 3310