This problem can be avoided by using @import statements within each style tag to import more than 30 stylesheets. Some discussion here: http://drupal.org/node/228818

Of course, you should avoid doing this in production anyway, and just asset package your stylesheets into very few stylesheets. I've made a fork of the asset_packager project to support this behavior after 31 stylesheets: http://github.com/jamesyu/asset_packager_ie_css_limit