Problem with Ubuntu Rated 3 out of 5 stars

Doesn't work well with Ubuntu's Unity desktop. The menu items should be hidden in Ubuntu's top panel but are instead ever present inside of Thunderbird. Spoils an otherwise effective add-on.

I don't use unity, so it is quite hard for me to follow your text. Could you make a screenshot?
How can menu items get hidden in a top panel not belonging to the application; isn't that part of the desktop manager and/or widgets only? Did that work with previous Thunderbird versions / does that work without the add-on installed?