With the latest thunderbird, the string to search for in the config editor to set it to check all folders for new email has changed from:
mail.check_all_imap_folders_for_new to mail.server.default.check_all_folders_for_new
As detailed here: http://kb.mozillazine.org/How_do_I_check_for_new_messages_in_other_folders Which caught me out for a while as I was looking for the old one in the config editor.
Sick of having to click on a window, then click on the button you think you already clicked on? Paste this into a terminal:
defaults write org.x.X11 wm_click_through -bool true
It all worked fine, slightly easier that Trixbox perhaps, and no weird forum registration required, and its pretty clean with FreePABX being the main interface.
Also went out and got another trailerload of firewood, but didn't take a photo of that ;-)