Two password prompts with 'su'

[Justin Bennett]

All,

Recently my machine (FreeBSD) started showing 2 password prompts when 
using su.

The first password seems to suffice, then hitting 'enter' on the second 
one lets me in.

Any ideas what is going on?

While I was writing this, it occurred to me that it may have something 
to do with Winbindd and nsswitch.conf.(?)

### Contents of nsswitch.conf ###
passwd:     files winbind
group:      files winbind
### End ###

Thanks,

Justin