SODA Noriyuki wrote:
>>But we can change wtmpx, 
> 
> 
> The latest NetBSD release (2.0) already had wtmpx,
> thus, we cannot change the format of wtmpx, either.
> Otherwise statically linked 3rd party programs (on 2.0) stop to
> work...
> --
> soda

So, can you explain me how those statically linked programs began to use 
wtmpx instead of wtmp?