Avoiding problems with naive / non-naive time formats

Hello, 

I had some problems using email confirmation due to timezone naivety.  I made a very small change to deal with it (and to use the Django-standard "auto-now-add" to set the timestamp for an email).  

I'm not 100% sure about what happens for a system that's not at all aware of timezones, but I *hope* this would work anyway.   

Hope this helps! 
Liz