I'm not usually one to moan about apps with high mem usage, but this is silly. I have tbird open 24/7, as you do with an email client, but this is munching up 170MB of memory. Even outlook 2007 used nowhere near this much, I thought thunderbird was lightweight! Maybe it has loaded my entire inbox into memory just for the fun of it I really don't know, but is there a way to tame this?