I had some issues regarding Gilles mails too (using Mail.app).. My
itch was that his mail somehow didn't get filtered into my jQuery
folder (turning up in my Inbox instead).
The reason was that Gilles sometimes uses CC for the jQuery
discussion mail address (and not TO), and my mail filter only catched
where recipient (TO) was [hidden email]. I just added CC to my
filter and now it works fine.