Segfaulting PbsMoms

We have an issue with segfaulting mom's that seems correlated with the server trying to ping it's moms. The server are version is torque-2.3.6-2cri.x86_64
We are currently supporting two OS's through the same batch system using submit filter and node properties. Therefore, we have two different versions of moms.
Nodes 1->295 have moms torque-2.3.6-2cri.x86_64 and 296->309 have moms torque-2.1.9-4cri.slc4.i386

When the moms segfault we see that the torque-2.1.9 moms stay up and only the torque-2.3.6 moms all die. I ran one of them through GDB and can see the call stack:

(gdb) where
#0 mom_server_find_by_ip (search_ipaddr=177078032) at mom_server.c:450
#1 0x000000000041965e in mom_server_valid_message_source (stream=0) at mom_server.c:2022
#2 0x0000000000419870 in is_request (stream=0, version=1, cmdp=0x7fffff542ae8) at mom_server.c:2125
#3 0x0000000000416997 in do_rpp (stream=0) at mom_main.c:5351
#4 0x0000000000416a52 in rpp_request (fd=) at mom_main.c:5408
#5 0x00002ae8ae9f3bc8 in wait_request (waittime=, SState=0x0) at ../Libnet/net_server.c:469
#6 0x0000000000416c1d in main_loop () at mom_main.c:8046
#7 0x0000000000416ee1 in main (argc=1, argv=0x7fffff5431d8) at mom_main.c:8148
(gdb) run
The program being debugged has been started already.
Start it from the beginning? (y or n) n
Program not restarted.
(gdb) bt full
#0 mom_server_find_by_ip (search_ipaddr=177078032) at mom_server.c:450
__v =
pms = (mom_server *) 0x6cbb80
addr =
#1 0x000000000041965e in mom_server_valid_message_source (stream=0) at mom_server.c:2022
addr = (struct sockaddr_in *) 0x187ef434
pms = (mom_server *) 0x0
id = 0x43be08 "mom_server_valid_message_source"
#2 0x0000000000419870 in is_request (stream=0, version=1, cmdp=0x7fffff542ae8) at mom_server.c:2125
command =
ret = 0
pms =
ipaddr =
id = "is_request"


So it looks like time to dive through the source for mom_server_find_by_ip (search_ipaddr=177078032) at mom_server.c:450 or install torque-2.4!