[rt-users] can't change a user's email address

[Gary Wilson Jr.]

In the user configuration, I'm trying to update a user's email address 
that has a typo.  I correct the email address and click 'Save Changes', 
but the email address does not update.  I do, however, get presented a 
'Results' box that reads:

User sobrien: 0 hours

When I try adding an email address to a user that has no defined email 
address already, I get the same error.

Anyone know what's going on here?  I've tried changing a few other 
fields (Real Name, Nickname, etc.) and those update fine.

I'm using RT 3.6.1.

Gary