Have the blatant security problems been ironed out?
http://bitslog.wordpress.com/2012/11/30/bitmessage-completel...
http://bitslog.wordpress.com/2012/11/30/bitmessage-completel...
http://www.reddit.com/r/bitmessage/comments/17muuv/bitmessag...
The updated version 2 is not backwards compatible with the version one because of the problems mentioned.