text differences between IE and Netscape

I have developed my own design which will be used as part of an overall site. The text looks different in IE and Netscape. It also looks different in IE from a regular page in IE. This suggests to me that there is something in my code that is causing this problem.

A sample regular page: http://hwwc.org/test/missionl.html
The blog page: http://hwwc.org/test/newsletter/

The wp-content folder is under the newsletter folder.

Any help will be greatly appreciated