There are vaious nasty looking lines (to my un-trained eye) in the putty console report, things like this (this is just a small selection):
[ 3.350000] Bad eraseblock 111 at 0x000000de0000
[ 3.360000] Bad eraseblock 139 at 0x000001160000
[ 3.370000] Bad eraseblock 164 at 0x000001480000
[ 3.400000] Bad eraseblock 260 at 0x000002080000
[ 3.410000] Bad eraseblock 270 at 0x0000021c0000
[ 3.420000] Bad eraseblock 303 at 0x0000025e0000
[ 3.430000] Bad eraseblock 320 at 0x000002800000
[ 3.440000] Bad eraseblock 344 at 0x000002b00000
[ 3.450000] Bad eraseblock 361 at 0x000002d20000
[ 3.470000] Bad eraseblock 406 at 0x0000032c0000
[ 3.480000] Bad eraseblock 415 at 0x0000033e0000
[ 3.490000] Bad eraseblock 418 at 0x000003440000
[ 3.500000] Bad eraseblock 433 at 0x000003620000
[ 3.530000] Bad eraseblock 521 at 0x000004120000
[ 3.560000] Bad eraseblock 617 at 0x000004d20000
[ 3.670000] Bad eraseblock 956 at 0x000007780000
[ 3.690000] Options: NO_AUTOINCR,NO_READRDY,
[ 3.700000] Creating 2 MTD partitions on "brcmnand":
[ 3.700000] 0x000002600000-0x000007b00000 : "brcmnand"
[ 3.710000] 0x000007b00000-0x000008000000 : "OpenVPN"
[ 3.720000] SQUASHFS error: Xattrs in filesystem, these will be ignored
[ 3.730000] VFS: Mounted root (squashfs filesystem) readonly on device 31:3.
[ 3.740000] devtmpfs: mounted
[ 3.750000] Freeing init memory: 224K
[sighandler]: No more events to be processed, quitting.
[cleanup]: Waiting for children.
[cleanup]: All children terminated.
Reading board data...
WSC UUID: 0x7437251ecd36a4e738aa81b097998a4c
NTP synchronized date/time: Fri Sep 19 15:12:20 2014
MAC address of 1st STA connected: 7C-7A-91-22-42-41
No RF parameters! Use default.
### main:1465 Set Normal Power!
[ 8.550000] Initialise conn table 2048 entries
insmod: proxyarp.ko: no module by that name found
insmod: usbcore.ko: no module by that name found
insmod: ehci-hcd.ko: no module by that name found
insmod: wl_high.ko: no module by that name found
eth3: cmd=14: No such device
wl1 not up in 3 sec
Hit enter to continue...WARNING: console log level set to 1
set_ntgr_vendor_ie:163 command (wl -i eth1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:185 command (wl -i eth1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:193 command (wl -i wl0.1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:214 command (wl -i wl0.1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:163 command (wl -i eth2 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:185 command (wl -i eth2 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:193 command (wl -i wl0.1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:214 command (wl -i wl0.1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:163 command (wl -i eth1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:185 command (wl -i eth1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:193 command (wl -i wl0.1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:214 command (wl -i wl0.1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:163 command (wl -i eth2 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:185 command (wl -i eth2 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:193 command (wl -i wl0.1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:214 command (wl -i wl0.1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:163 command (wl -i eth1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:185 command (wl -i eth1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:193 command (wl -i wl0.1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:214 command (wl -i wl0.1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:163 command (wl -i eth2 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:185 command (wl -i eth2 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:193 command (wl -i wl0.1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:214 command (wl -i wl0.1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:163 command (wl -i eth1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:185 command (wl -i eth1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:193 command (wl -i wl0.1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:214 command (wl -i wl0.1 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:163 command (wl -i eth2 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:185 command (wl -i eth2 add_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:193 command (wl -i wl0.1 del_ie 63 6 00:14:6C 000000)
set_ntgr_vendor_ie:214 command (wl -i wl0.1 add_ie 63 6 00:14:6C 000000)
killall: upnp: no process killed
upnp: No such file or directory
killall: eapd: no process killed
eth1: WLC_GET_VAR(psta_if): Invalid argument
eth2: WLC_GET_VAR(psta_if): Invalid argument
Set event_msg bitvec [6 8 10 12 25 44] on wl0[eth1]
Set event_msg bitvec [6 8 10 12 25 44] on wl1[eth2]
### nas: Apr 29 2016 23:54:29 version 7.14.89.26026.3 (r627234)
killall: wps_monitor: no process killed
killall: wps_ap: no process killed
killall: wps_enr: no process killed
Digital core power voltage set to 1.0V
Decompressing...done
Digital core power voltage set to 1.0V