Thunderbird Ctrl+F open Quick Filter not Find in message

In Thunderbird, if you have selected a message so that it's shown below your message list (not double click to open in separate tab), pressing Ctrl + F won't give you a find box for the message. Instead, it will open the Quick Filter bar which lets you search for messages.

To get a search bar where you can search within the message text press Ctrl + F twice(!) OR press Ctrl + G.

Note: shortcut to hide the bars is escape, once for each bar.

Solution source: http://groups.google.com/group/mozilla.feedback.thunderbird/browse_thread/thread/877e7351d9bd51fd
And
http://kb.mozillazine.org/Make_Thunderbird_3.1_look_like_Thunderbird_2