I'm using the 461 build and have seen this happen a couple times but most of them have been fine for me.

On Mon, 2007-01-29 at 14:38 -0600, Chris Jett wrote:
Before I go through the trouble of downloading the nightly build, is  
the Reply issue resolved yet?  Where you click 'Reply' and the To  
address is not populated?
--
Chris Jett
chris@jettfuel.net