2 thunderbird questions

[Paul Cartwright <debian@pcartwright.com>]

there are 2 problems I have with thunderbird..
1. when reading new emails in a folder, this is a local IMAP folder, and
you get to the end of single new messages, and the next new message is
in a thread that isn't open, IT STOPS READING. I have to click on
another message in the folder, THEN hit"n" and it opens the closed
thread of new messages..
Thunderbird 3.1.6 on Lenny

2. how do you change the VIEW-SORT-BY to threaded- globally? I keep
finding folders that aren't sorted by threads...

-- 
Paul Cartwright
Registered Linux user # 367800