[c-nsp] nvram writing config issue

[Alex Howells]

Not seen this one before, thought I'd ask the oracles what the fix is?

Directory of nvram:/

   28  -rw-       31882                    <no date>  startup-config
   29  ----        3647                    <no date>  private-config
    1  ----          12                    <no date>  persistent-data

switch#write mem
Building configuration...

% Warning: Saving this config to nvram may corrupt any network
management or security files stored at the end of nvram.
Continue? [no]:

If you don't save the config --

% Configuration buffer full, can't add command: interface FastEthernet0/37
%Aborting Save. Compress the config.[OK]

If you do save the config --

Jul 25 13:35:39.242 BST: %SYS-4-CONFIG_NV_OVERRUN: Non config data
present at the end of nvram is corrupted

Switch is a WS-C2960-48TT-L running 12.2(25)SEE4.

Thanks,
Alex