I don't know if it's just me......But when I post, the subject line is in an invisisble mode. I tried to change the background of it. It shows that it is gray like the body is, but it doesn't show up that way when you use it.
My solution is to work around this defect and just type and highlight it when you're finished so you can see if it's right.
If you will notice, it has a drop down auto fill feature, maybe that is why I can't change the color.
ALSO please note. You must put the RIGHT subject in the title line. It doesn't automatically do it for you when you hit respond. If you leave it blank it will direct you to do it right. IF you mis-do the title. You will start a new subject. That's a real PAIN. So be careful.