Data Node Crashes after upgrade from 7.2.4 to 7.2.5 (no replies)

We upgraded cluster over the weekend, and one of our data nodes crashes about once an hour with the following error :

Node 3: Forced node shutdown completed. Caused by error 2341: 'Internal program error (failed ndbrequire)(Internal error, programming error or missing error message, please report a bug). Temporary error, restart node'.

The full error from the error log is :

Time: Monday 16 April 2012 - 09:10:55
Status: Temporary error, restart node
Message: Internal program error (failed ndbrequire) (Internal error, programming error or missing error message, please report a bug)
Error: 2341
Error data: DblqhMain.cpp
Error object: DBLQH (Line: 9785) 0x00000002
Program: ndbd
Pid: 13135
Version: mysql-5.5.20 ndb-7.2.5
Trace: /var/lib/mysql/mysql-cluster/ndb_data/ndb_3_trace.log.3 [t1..t1]
***EOM***

We have rebuilt the node with --initial, but the crashing continues. The cluster was rock solid under 7.2.4, but that version contained a bug #64350 we needed to resolve. Since the error message does not point to a specific problem, I'm not sure where to go with this. Below is the config.ini.

config.ini

[ndb_mgmd]
HostName=db-admin
DataDir=/var/lib/mysql/mysql-cluster/ndb_data
NodeId=1

[ndbd default]
noofreplicas=2
DataDir=/var/lib/mysql/mysql-cluster/ndb_data
MaxNoOfOrderedIndexes=4096
MaxNoOfAttributes=10000
DataMemory=4096M
IndexMemory=500M
MaxNoOfConcurrentOperations=500000
MaxNoOfLocalOperations=550000
MaxNoOfExecutionThreads=8
DiskCheckPointSpeed=20M

[ndbd]
HostName=db1
NodeId=3

[ndbd]
HostName=db2
NodeId=4

[mysqld]
NodeId=51

[mysqld]
NodeId=52

[mysqld]
NodeId=53