Error: "process sp_opst_mt killed due to SIGSEGV" and subsequent core dump (4305059)

After upgrading to 6.0.1 or installing a new 6.0.1 environment poster can exit with the following error messages in the event_log:

06/23/08 19:00 Error: process sp_opst_mt killed due to SIGSEGV [sp_cop/16167]
06/23/08 19:00 Notice: process sp_opst_mt killed due to SIGSEGV; (core file = /oracle/var/dump/core.16884) [sp_cop/16167]

After restarting post will continue to work but eventually fail again.

You see the following entries in the core.out file:
===> Process sp_opst_mt (pid 16167) received signal SIGSEGV (11) <===
core '/shareplex/var/dump/core.16884' of 16167:  /quest/.app-modules/sp_opst_mt -uocedb1
-----------------   lwp# 3 / thread# 401   --------------------
 fe2b3a8c strncpy   (44223d3a, 467dd4, 400, 75706461, 1cb520, 44223d3a) + 498
 000f08dc SessStatsAfter (2, df9bf0, fcafbc90, 1, 2eab4f0e, b58830) + 558
 0008e92c StRoutine (570318, fe1a3d38, 0, 5, 1, fe401000) + 44c
 fe1eb01c _thread_start (570318, 0, 0, 0, 0, 0) + 40

The important information to look for is: "StRoutine", "SessStatsAfter" and "strncpy". All these together point to an issue with the statistics module.