With the advent of Thunderbird 3, searching messages became a bit more sassy in the old bird.
There is one little problem: it is not readily apparent how one actually searches for text inside an open e-mail.
It used to be that you could just type Ctrl-F and the little “Find” bar opened at the bottom of your message pane/window. Type in some text, and all instances of that text would be highlighted in the open message.
In the latest Tbird, that doesn’t work in certain cases. In fact, searching in an open message has become downright annoying, and nobody seems to know how to make it work. Several people even filed bug reports about it.
This situation was obviously intolerable, so I finally managed to solve it!