I recently modified the WP-ADMIN interface for a custom CMS. I noticed that Firefox RC1 does not interpret the ".submit input" CSS directives. To fix this, I did a global search / replace for all "<input type="submit">" tags, and added "<input class="submit" type="submit">". By added a ".submit" directive to the WP-ADMIN.CSS file, I was then able to have styled buttons for all submit form elements. Could this be incorporated into the next release?