Ditto the font size.
I have an issue with T/Bird concerning font size also.
If I hit 'reply' and type the fonts are miniscule. I can hit ctrl+ to increase it but I can't get it to default.
Another issue I have is the ad. window when you bring up 'Write'.
The window doesn't include the scroll down arrow. I have to drag the right margin over to get it. A pain in the a$$.
On my wife's new Dell, if the web pages loaded any faster the program would have to be mindreading.