I need web design help

[RedRoseSAI]

I'm fairly certain there are some advanced web designers here on GC. If that's you, I'm working on a project right now and am running into two issues that are driving me crazy:

a) I use Cascading Style Sheets to format the text of all pages. They look great in IE. In a Mozilla browser (such as Firefox, which I love very much) the text is teeny. Is there a CSS command that tells Mozilla pages to make the text bigger? I'm aiming for font size 2 across the board. BTW, most of my text is placed within layers.

b) Instead of saving the navigation bar on each individual page, I've decided to make it a Server Side Include. Suddenly, the navigation bar isn't showing up on any of the pages. If someone would be so kind as to help, I'll PM you the URL so you can take a look at my code. Hopefully I'm just screwing up some minor detail.

Thank you very much!