[c-nsp] 7204VXR(NPE-G1) running c7200-jk9s-mz.123-14.T3.bin

[Mark Tohill]

Hello,
 
We have 7204-NPEG1s x 2 running c7200-jk9s-mz.123-14.T3.bin. These boxes are running BGP(default only), and terminating DSL L2TP VPDN's.
 
We're having a few issues with that image, one involving 'VTemplate Manager' tracebacks. According to TAC, this is bugid:
 
CSCeh90534
Externally found severe defect: Duplicate (D)
memory leak with micro_block_alloc calling VTEMPLATE Backgr

Duplicate of :  CSCeg81196, fixed in 12.3(14)T4 and later
 
On same boxes, we get the following:
 
Aug 31 13:38:15.293: %PARSER-4-BADCFG: Unexpected end of configuration file. 
Aug 31 13:38:15.297: %PARSER-4-BADCFG: Unexpected end of configuration file.
 
This is having the interesting side effect of not 'saving' a Loopback and GRE Tunnel interface to the running config file. When we show specific interface configurations, it's fine. See below:
 
#sh run int tunnel 0
Building configuration...
Current configuration : 136 bytes
!
interface Tunnel0
 ip address 192.168.200.2 255.255.255.252
 tunnel source GigabitEthernet0/2.200
 tunnel destination a.b.c.d
end
 
#sh run int loopback 0
Building configuration...
Current configuration : 111 bytes
!
interface Loopback0
 description VPDN Tunnel Endpoint
 ip address a.b.c.d 255.255.255.255
end
 
So we know the interfaces are there, being routed over, but we you do an ordinary 'show run', they're configs are not complete..IP addressing gone. 
 
#sh running-config | begin Tunnel0
interface Tunnel0
 !
 interface Loopback0
 description VPDN Tunnel Endpoint
!

Therefore we can't make any changes to the config, we'll loose them when we save to startup!! The loopback is fairly critical, it terminates the L2TP tunnel, an on reboot, the VPDN sessions will not come up since there are no tunnels to carry them.
 
Has anyone encounterd this problem? We have been advised by TAC to upgrade to 12.4 mainline, which is fine, but I cannot get info regarding the config file corruption. 
 
Any experiences/ideas appreciated.
 
Mark